Publications and communications of Yves Crama

Baratto, M., & Crama, Y. (In press). Cycle Selections. Discrete Applied Mathematics. doi:10.1016/j.dam.2022.07.005

Crama, Y. (09 January 2023). Old and new algorithms for polynomial unconstrained optimization problems in binary variables. Paper presented at NUMA Study Day 2023, Gand, Belgium.

Baratto, M., Crama, Y., Pedroso, J. P., & Ana, V. (13 September 2022). Locally Stable Exchanges - Conference ORBEL36. Paper presented at ORBEL36, Gent, Belgium.

Crama, Y., Elloumi, S., Lambert, A., & Rodriguez-Heck, E. (2022). Quadratization and convexification in polynomial binary optimization. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/295296.

Crama, Y., Grabisch, M., & Martello, S. (Eds.). (July 2022). Surveys in Operations Research VI (Invited Surveys from "4OR", 2018-2020). Annals of Operations Research, 314 (1).

Clavijo Lopez, C. J., Crama, Y., Pironet, T., & Semet, F. (2022). Multi-period distribution networks with purchase commitment contracts. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/291528.

Clavijo Lopez, C., Crama, Y., & Pironet, T. (2022). Multi-period distribution networks with stochastic demand and capacity commitment contracts. (Version 1). Eprint/Working paper retrieved from https://orbi.uliege.be/2268/291964.

Sepulchre, E., Pittie, G., Stojkovic, V., Haesbroeck, G., Crama, Y., Schyns, M., Paridaens, H., de Marchin, J., Degesves, S., Biemar, C., Boccar, S., Senterre, J.-M., & Minon, J.-M. (2022). Covid-19: contribution of clinical characteristics and laboratory features for early detection of patients with high risk of severe evolution. Acta Clinica Belgica, 77 (2), 261-267. doi:10.1080/17843286.2020.1822078

Smeulders, B., Bartier, V., Crama, Y., & Spieksma, F. C. R. (2022). Recourse in Kidney Exchange Programs. INFORMS Journal on Computing, 34 (2), 1191-1206. doi:10.1287/ijoc.2021.1099

Crama, Y. (10 November 2021). Kidney exchanges and cycle selections. Paper presented at Séminaire interne, Grenoble, France.

Crama, Y. (November 2021). Everything you always wanted to know about the editorial process. Paper presented at Operations seminars.

Crama, Y. (September 2021). Recherche opérationnelle et industrie. Bibliothèque Tangente, 75, p. 90-93.

Crama, Y., Hübner, G., Leruth, L., & Renneboog, L. (2021). Identifying Ultimate Beneficial Owners: A risk-based approach to improving the transparency of international financial flows. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/263411.

Baratto, M., & Crama, Y. (11 June 2021). Selecting directed cycles: a polyhedral study. Paper presented at ECCO 2021.

Baratto, M., & Crama, Y. (21 May 2021). Selecting directed cycles, a polyhedral study. Paper presented at Seminar in the Combinatorial Optimization group at the Eindhoven University of Technology.

Baratto, M., & Crama, Y. (20 April 2021). Selecting directed cycles: a polyhedral study. Poster session presented at 3rd IMA and OR Society Conference on Mathematics of Operational Research (Online event).

Crama, Y., Grabisch, M., & Martello, S. (2021). 4OR comes of age: Editorial note. 4OR: A Quarterly Journal of Operations Research, 19, 1-13. doi:10.1007/s10288-021-00475-0

Crama, Y. (2020). Quand les maths nous transportent. Paper presented at Pi Day 2020.

Boros, E., Crama, Y., & Rodriguez Heck, E. (2020). Compact quadratizations for pseudo-Boolean functions. Journal of Combinatorial Optimization, 39, 687-707. doi:10.1007/s10878-019-00511-0

Paquay, C., Crama, Y., & Pironet, T. (2020). Recovery management for a dial-a-ride system with real-time disruptions. European Journal of Operational Research, 280, 253-269. doi:10.1016/j.ejor.2019.08.006

Dokka, T., Crama, Y., Duvillié, G., & Spieksma, F. C. R. (2019). Column generation algorithms for the wafer-to-wafer integration problem. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/241939.

François, V., Arda, Y., & Crama, Y. (December 2019). Adaptive large neighborhood search for multi-trip vehicle routing with time windows. Transportation Science, 53 (6), 1706-1730. doi:10.1287/trsc.2019.0909

Crama, Y. (September 2019). Of (hyper)graphs and functions of binary variables: Old and recent results. Paper presented at Tribute to Frédéric Maffray, Grenoble, France.

Crama, Y., Gendron, B., & Ries, B. (May 2019). Tenth International Colloquium on Graphs and Optimization (GO X), 2016. Discrete Applied Mathematics, 261, 1-354. doi:10.1016/j.dam.2019.02.026

Crama, Y., & Pironet, T. (04 January 2019). Vehicle allocation problem with uncertain transportation requests over a multi-period rolling horizon. Logistics Research, 12 (1), 1-22. doi:10.23773/2019_1

Bartier, V., Smeulders, B., Crama, Y., & Spieksma, F. C. R. (2019). Recourse in Kidney Exchange Programs. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/231958.

Brauner, N., Crama, Y., Delaporte, E., Jost, V., & Libralesso, L. (2019). Do balanced words have a short period? Theoretical Computer Science, 793, 169-180. doi:10.1016/j.tcs.2019.06.017

Buchheim, C., Crama, Y., & Rodriguez Heck, E. (2019). Berge-acyclic multilinear 0-1 optimization problems. European Journal of Operational Research, 273, 102-107. doi:10.1016/j.ejor.2018.07.045

Paquay, C., Crama, Y., & Pironet, T. (2019). A reactive algorithm for a dial-a-ride problem with real-time disruptions. Paper presented at ORBEL 33, Hasselt, Belgium.

Smeulders, B., Crama, Y., & Spieksma, F. C. R. (2019). Revealed preference theory: An algorithmic outlook. European Journal of Operational Research, 272, 803-815. doi:10.1016/j.ejor.2018.04.026

Crama, Y., Grabisch, M., & Martello, S. (Eds.). (December 2018). Seven Surveys in Operations Research. Annals of Operations Research, 271 (1). doi:10.1007/s10479-018-3036-3

François, V., Arda, Y., & Crama, Y. (July 2018). Large neighborhood search approaches for multi-trip vehicle routing with time windows and driver shifts. Paper presented at EURO 2018 - 29th European Conference on Operational Research, Valencia, Spain.

Crama, Y. (16 June 2018). Reformulations of nonlinear binary optimization problems. Paper presented at ECCO XXX1 - 31th Conference of the European Chapter on Combinatorial Optimization, Fribourg, Switzerland.

Crama, Y. (14 May 2018). Quadratizations in nonlinear binary optimization: new results. Paper presented at Mathematics seminar, Koper, Slovenia.

Crama, Y. (2018). Optimiser la logistique: Slogan ou réalité? Paper presented at Optimiser le transport et la distribution en 2018: slogan ou réalité?.

Crama, Y. (March 2018). Reformulations of nonlinear binary optimization problems. Paper presented at Maastricht University Graduate School of Business and Economics Seminar.

Crama, Y. (2018). Author spotlight. INFORMS Journal Highlights.

Crama, Y., Grabisch, M., & Martello, S. (2018). Editorial: Sweet sixteen. 4OR: A Quarterly Journal of Operations Research, 1-13. doi:10.1007/s10288-018-0373-7

Rodriguez Heck, E., & Crama, Y. (01 February 2018). Linear and quadratic reformulation techniques for nonlinear 0-1 optimization problems. Paper presented at 32nd annual conference of the Belgian Operational Research Society (ORBEL 32), Liege, Belgium.

Boros, E., Crama, Y., & Rodriguez Heck, E. (04 January 2018). Quadratizations of symmetric pseudo-Boolean functions: sub-linear bounds on the number of auxiliary variables. Paper presented at International Symposium on Artificial Intelligence and Mathematics (ISAIM 2018), Fort Lauderdale, United States.

Crama, Y., Rezaei Sadrabadi, M., Savelsbergh, M., & Van Woensel, T. (2018). Stochastic Inventory Routing for Perishable Products. Transportation Science, 52 (3), 526-546. doi:10.1287/trsc.2017.0799

Paquay, C., Crama, Y., & Pironet, T. (2018). Dial-a-ride with real-time disruptions. Paper presented at OR 2018, Bruxelles, Belgium.

Paquay, C., Crama, Y., & Pironet, T. (2018). Dial-a-ride with real-time disruptions. Paper presented at 29th European Conference on Operational Research, Valencia, Spain.

Crama, Y., Goossens, D., Leus, R., Schyns, M., & Spieksma, F. (Eds.). (December 2017). Special issue: Twelfth Workshop on Models and Algorithms for Planning and Scheduling Problems (MAPSP 2015). Journal of Scheduling, 20 (6), 543-711. doi:10.1007/s10951-017-0548-7

Rodriguez Heck, E., & Crama, Y. (17 July 2017). Linearization and quadratization techniques for 0-1 optimization problems. Paper presented at 21st conference of the International Federation of Operational Research Societies.

Rodriguez Heck, E., & Crama, Y. (13 July 2017). A class of valid inequalities for multilinear 0-1 optimization problems. Paper presented at 15th EUROPT Workshop on Advances in Continuous Optimization.

François, V., Arda, Y., & Crama, Y. (10 July 2017). Neighborhood search approaches for a multi-trip vehicle routing problem with time windows. Paper presented at VeRoLog 2017 - Annual Workshop of the EURO Working Group on Vehicle Routing and Logistics optimization, Amsterdam, Netherlands.

Rodriguez Heck, E., & Crama, Y. (21 March 2017). A class of valid inequalities for multilinear 0-1 optimization problems. Poster session presented at Women in Optimization Workshop, ALOP, Universität Trier.

Rodriguez Heck, E., & Crama, Y. (13 March 2017). A class of valid inequalities for multilinear 0-1 optimization problems. Paper presented at Boolean Seminar Liblice 2017.

Anthony, M., Boros, E., Crama, Y., & Gruber, A. (2017). Quadratic reformulations of nonlinear binary optimization problems. Mathematical Programming, 162, 115-144. doi:10.1007/s10107-016-1032-4

Crama, Y., & Rodriguez Heck, E. (2017). A class of valid inequalities for multilinear 0-1 optimization problems. Discrete Optimization, 25, 28-47. doi:10.1016/j.disopt.2017.02.001

François, V., Arda, Y., & Crama, Y. (2017). Adaptive large neighborhood search for multi-trip vehicle routing with time windows. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/216747.

Crama, Y. (14 December 2016). Quadratic reformulations of nonlinear binary optimization problems. Paper presented at VOCAL Optimization Conference: Advanced Algorithms, Esztergom, Hungary.

Rodriguez Heck, E., & Crama, Y. (14 December 2016). A class of valid inequalities for multilinear 0-1 optimization problems. Paper presented at VOCAL Optimization Conference: Advanced Algorithms, Esztergom, Hungary.

Crama, Y., Grabisch, M., & Martello, S. (December 2016). Editorial: A brand new cheating attempt: a case of usurped identity. 4OR: A Quarterly Journal of Operations Research, 14, 333-336. doi:10.1007/s10288-016-0329-8

François, V., Arda, Y., Crama, Y., & Laporte, G. (01 December 2016). Large neighborhood search for multi-trip vehicle routing. European Journal of Operational Research, 255 (2), 422-441. doi:10.1016/j.ejor.2016.04.065

Talla Nobibon, F., Cherchye, L., Crama, Y., Demuynck, T., De Rock, B., & Spieksma, F. C. R. (November 2016). Revealed preference tests of collectively rational consumption behavior: formulations and algorithms. Operations Research, 64 (6), 1197–1216. doi:10.1287/opre.2016.1527

Crama, Y. (05 September 2016). Balanced words and related concepts: applications and complexity issues. Paper presented at 16th Mons Theoretical Computer Science Days.

Crama, Y. (17 August 2016). Reformulations of nonlinear binary optimization problems. Paper presented at STOR-i Seminar, Lancaster, United Kingdom.

François, V., Arda, Y., & Crama, Y. (06 July 2016). Neighborhood search approaches for multi-trip vehicle routing problems. Paper presented at EURO 2016 - 28th European Conference on Operational Research, Poznan, Poland.

Crama, Y. (July 2016). Quadratic reformulations of nonlinear binary optimization problems. Paper presented at GO X - International Colloquium on Graphs and Optimization 2016, Rigi, Switzerland.

Rodriguez Heck, E., & Crama, Y. (02 June 2016). A class of valid inequalities for multilinear 0-1 optimization problems. Poster session presented at 18th Conference on Integer Programming and Combinatorial Optimization (IPCO XVIII), Liège, Belgium.

François, V., Arda, Y., Crama, Y., & Laporte, G. (10 February 2016). Recherche à voisinage large pour le problème de tournées de véhicules à voyages multiples. Paper presented at ROADEF 2016 - 17e Conférence Annuel de la Société Française de Recherche Opérationnelle et d'Aide à la Décision, Compiègne, France.

Rodriguez Heck, E., & Crama, Y. (28 January 2016). Tightening linearizations of non-linear binary optimization problems. Paper presented at ORBEL30: 30th annual conference of the Belgian Operational Research Society, Louvain-la-Neuve, Belgium.

Anthony, M., Boros, E., Crama, Y., & Gruber, A. (2016). Quadratization of symmetric pseudo-Boolean functions. Discrete Applied Mathematics, 203, 1-12. doi:10.1016/j.dam.2016.01.001

François, V., Arda, Y., Crama, Y., & Laporte, G. (2015). Large neighborhood search for multi-trip vehicle routing. (Version 30/11/2015). Eprint/Working paper retrieved from https://orbi.uliege.be/2268/187309.

Crama, Y. (29 October 2015). Revealed preference tests of collectively rational consumption behavior. Paper presented at COMEX Seminars, ULB, Belgium.

Crama, Y. (23 October 2015). Quadratizations of pseudo-Boolean functions. Paper presented at Ordered Structures in Games and Decisions, Paris, France.

Küçükaydın, H., Arda, Y., Crama, Y., & Michelini, S. (15 July 2015). Branch-and-Price Based Matheuristics for a Vehicle Routing Problem with Time Windows and Variable Service Start Time. Paper presented at EURO 2015 - 27th European Conference on Operational Research, Glasgow, United Kingdom.

Rodriguez Heck, E., & Crama, Y. (13 July 2015). Strengthening linear reformulations of pseudo-Boolean optimization problems. Paper presented at 27th European Conference on Operational Research, Glasgow, United Kingdom.

Crama, Y., Anthony, M., Boros, E., & Gruber, A. (July 2015). Quadratization of pseudo-Boolean functions. Paper presented at EURO 2015 - 27th European Conference on Operational Research, Glasgow, United Kingdom.

Rodriguez Heck, E., & Crama, Y. (23 June 2015). Linearization and quadratization approaches for non-linear 0-1 optimization. Paper presented at Oberseminar Diskrete Optimierung, Dortmund, Germany.

Michelini, S., Arda, Y., Crama, Y., & Küçükaydin, H. (10 June 2015). Exact and Heuristic Solution Methods for a VRP with Time Windows and Variable Service Start Time. Paper presented at VeRoLog 2015 - Annual Workshop of the EURO Working Group on Vehicle Routing and Logistics optimization, Vienna, Austria.

Marchetti-Spaccamela, A., Crama, Y., Goossens, D., Leus, R., Schyns, M., & Spieksma, F. (Eds.). (2015). Proceedings of the 12th Workshop on Models and Algorithms for Planning and Scheduling Problems. KU Leuven.

Pironet, T., & Crama, Y. (01 June 2015). Multi-period vehicle assignment problem with stochastic transportation order availability. Paper presented at Odysseus 2015 Sixth International Workshop on Freight Transportation and Logistics, Ajaccio, France.

Crama, Y. (29 April 2015). Functions of binary variables. Paper presented at Decision Making and Social Choice.

Crama, Y. (2015). Quand les maths nous transportent. Paper presented at Matinée scientifique.

Michelini, S., Arda, Y., Crama, Y., & Küçükaydin, H. (05 February 2015). Exact and Heuristic Solution Methods for a VRP with Time Windows and Variable Service Start Time. Paper presented at ORBEL29 - 29th annual conference of the Belgian Operational Research Society.

Crama, Y., Rezaei Sadrabadi, M., & Van Woensel, T. (2015). A branch-and-price algorithm for 2-period vehicle routing problems. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/175663.

Rodriguez Heck, E., & Crama, Y. (04 December 2014). Quadratizations of pseudo-Boolean functions. Paper presented at COMEX Project Annual Meeting 2014.

Crama, Y. (20 November 2014). Boolean Functions for Classification: Logical Analysis of Data. Paper presented at DA2PL 2014 from Multicriteria Decision Aid to Preference Learning, Paris, France.

Crama, Y. (2014). Quand les maths nous transportent. Paper presented at Matinée scientifique.

Crama, Y. (28 October 2014). Revealed preference tests of collectively rational consumption behavior. Paper presented at Graphs and decisions, Luxembourg, Luxembourg.

Arda, Y., Crama, Y., Kronus, D., Pironet, T., & Van Hentenryck, P. (August 2014). Multi-period vehicle loading with stochastic release dates. EURO Journal on Transportation and Logistics, 3 (2), 93-119. doi:10.1007/s13676-013-0035-z

Crama, Y., & Rodriguez Heck, E. (2014). Short Prime Quadratizations of Cubic Negative Monomials. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/170649.

Arda, Y., Crama, Y., François, V., & Laporte, G. (17 July 2014). Specific Multi-trip Operators for Vehicle Routing Problems. Paper presented at IFORS 2014 - 20th Conference of the International Federation of Operational Research Societies, Barcelona, Spain.

Küçükaydın, H., Arda, Y., & Crama, Y. (2014). Optimization of the service start time for an elementary shortest path problem with time windows. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/170446.

Crama, Y. (09 July 2014). Approximation algorithms for multi-dimensional vector assignment problems. Paper presented at GO IX - Graphs and Optimization, Sirmione, Italy.

Arda, Y., Crama, Y., François, V., & Laporte, G. (25 June 2014). Vehicle routing problems with multiple trips: using specific local search operators. Paper presented at VeRoLog 2014 - Annual Workshop of the EURO Working Group on Vehicle Routing and Logistics optimization, Oslo, Norway.

Arda, Y., Kucukaydin, H., & Crama, Y. (12 June 2014). Service Start Time Optimization in Elementary Shortest Path Problems with Resource Constraints. Paper presented at Graphes et Optimisation Mathémathique (GOM) Seminars, Brussels, Belgium.

Crama, Y. (07 May 2014). About almost periodic sequences of integers and related concepts. Paper presented at Discrete Mathematics Seminar.

Crama, Y., & Rodriguez Heck, E. (25 March 2014). Compact quadratizations of nonlinear binary optimization problems. Paper presented at Belgian Mathematical Programming Workshop, Belgium.

Arda, Y., Crama, Y., & Kucukaydin, H. (31 January 2014). An exact bi-directional dynamic programming algorithm for an elementary shortest path problem with variable service start time. Paper presented at ORBEL 28 - 28th annual conference of the Belgian Operational Research Society, Mons, Belgium.

Crama, Y. (30 January 2014). Quadratic reformulations of nonlinear binary optimization problems. Paper presented at ORBEL 28 - Conference of the Belgian Operational Research Society, Mons, Belgium.

Crama, Y. (06 January 2014). Quadratic reformulations of nonlinear binary optimization problems. Paper presented at 13th International Symposium on Artificial Intelligence and Mathematics, Fort Lauderdale, United States.

Dokka, T., Crama, Y., & Spieksma, F. C. R. (2014). Multi-Dimensional Vector Assignment Problems. Discrete Optimization, 14, 111-125. doi:10.1016/j.disopt.2014.08.005

Arda, Y., Crama, Y., & François, V. (08 July 2013). Neighborhood Search Approaches for a Vehicle Routing Problem with Multiple Trips and Driver Shifts. Paper presented at VeRoLog 2013 - Annual Workshop of the EURO Working Group on Vehicle Routing and Logistics optimization.

Kucukaydin, H., Arda, Y., & Crama, Y. (08 July 2013). Optimization of Service Start Time for an Elementary Shortest Path Problem. Paper presented at VeRoLog 2013 - Annual Workshop of the EURO Working Group on Vehicle Routing and Logistics optimization, Southampton, United Kingdom.

Crama, Y. (04 July 2013). Approximation Algorithms for Multi-Dimensional Vector Assignment Problems. Paper presented at EURO INFORMS 2013 - 26th European Conference on Operational Research, Rome, Italy.

Bay, M., Crama, Y., & Rigo, P. (01 July 2013). A global optimization method for naval structure op- timization. Paper presented at EURO INFORMS 2013 - 26th European Conference on Operational Research, Roma, Italy.

Crama, Y. (01 July 2013). Quadratic reformulations of nonlinear binary optimization problems. Paper presented at EURO INFORMS 2013 - 26th European Conference on Operational Research, Rome, Italy.

Crama, Y. (20 June 2013). Quadratization of pseudo-Boolean functions. Paper presented at LSE Discrete Maths and Game Theory Seminar, Londres, United Kingdom.

Dokka, T., Crama, Y., & Spieksma, F. C. R. (2013). Approximation Algorithms for Multi-Dimensional Vector Assignment Problems. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/147977.

Kucukaydin, H., Arda, Y., & Crama, Y. (02 May 2013). An elementary shortest path problem with variable service start time. Paper presented at 10th International Conference on Computational Management Science, Montréal, Canada.

Crama, Y. (April 2013). Quadratization of symmetric pseudo-Boolean functions. Paper presented at Boolean Seminar Liblice 2013, Liblice, Czechia.

Arda, Y., Crama, Y., & François, V. (13 February 2013). An adaptive large neighborhood search for a vehicle routing problem with multiple trips and driver shifts. Paper presented at ROADEF 2013 - 14e Congrès Annuel de la Société Française de Recherche Opérationnelle at d'Aide à la Décision, Troyes, France.

Arda, Y., Crama, Y., & Kucukaydin, H. (08 February 2013). Elementary shortest path problems for a multiple-trip vehicle routing problem. Paper presented at ORBEL 27 - 27th annual conference of the Belgian Operational Research Society, Kortrijk, Belgium.

Arda, Y., Crama, Y., & François, V. (07 February 2013). An adaptive large neighborhood search for a vehicle routing problem with multiple trips and driver shifts. Paper presented at ORBEL 27 - 27th annual conference of the Belgian Operational Research Society, Kortrijk, Belgium.

Crama, Y. (February 2013). Méthodes Booléennes en recherche opérationnelle. Paper presented at ROADEF 2013, Troyes, France.

Crama, Y. (January 2013). Algorithmes d'approximation pour les problèmes d'affectation multidimensionnels. Paper presented at Séminaire de recherche opérationnelle, Grenoble, France.

Crama, Y., & Leruth, L. (2013). Power indices and the measurement of control in corporate structures. International Game Theory Review, 15, 1340017. doi:10.1142/S0219198913400173

Talla Nobibon, F., Cherchye, L., Crama, Y., Demuynck, T., De Rock, B., & Spieksma, F. (09 November 2012). Algorithms for testing the collective consumption model. Paper presented at Ordered Structures in Games and Decision, Paris, France.

Crama, Y. (09 June 2012). Boolean Methods and Logical Analysis of Data. Paper presented at International Workshop on Three Approaches to Data Mining, Thuwal, Saudi Arabia.

Arda, Y., Crama, Y., Kronus, D., Pironet, T., & Van Hentenryck, P. (24 May 2012). Multiperiod vehicle loading with stochastic release dates. Paper presented at Odysseus 2012, Mykonos, Greece.

Arda, Y., Crama, Y., Kucukaydin, H., & Talla Nobibon, F. (2012). A Rich Vehicle Routing Problem with Multiple Trips and Driver Shifts. Paper presented at VeRoLog 2012 - Annual Workshop of the EURO Working Group on Vehicle Routing and Logistics optimization, Bologna, Italy.

Crama, Y. (November 2011). Boolean methods in operations research and related areas. Paper presented at INFORMS Annual Meeting, Charlotte, NC, United States.

Crama, Y., Leruth, L., & Su Wang. (June 2011). Control and Voting Power in Complex Shareholding Networks. Paper presented at Tenth Cologne-Twente workshop on graphs and combinatorial optimization, Frascati, Italy.

Amand, G., Arda, Y., Crama, Y., Kronus, D., & Pironet, T. (07 April 2011). Multiperiod vehicle loading optimization with stochastic supply. Paper presented at UGR GreatRoad: Working Group HEC-ULg meeting, Liège, Belgium.

Bair, J., Crama, Y., Henry, V., & Justens, D. (2011). Modèles mathématiques en gestion. Paris, France: Cassini et POLE.

Boros, E., Crama, Y., De Werra, D., Hansen, P., & Maffray, F. (2011). The Mathematics of Peter L. Hammer (1936-2006): Graphs, Optimization, and Boolean Models. In E. Boros, Y. Crama, D. De Werra, P. Hansen, F. Maffray, ... B. Simeone (Eds.), The Mathematics of Peter L. Hammer (1936-2006): Graphs, Optimization, and Boolean Models (pp. 1-18). Springer. doi:10.1007/s10479-011-0913-4

Boros, E., Crama, Y., de Werra, D., Hansen, P., Maffray, F., & Simeone, B. (Eds.). (2011). The Mathematics of Peter L. Hammer (1936-2006): Graphs, Optimization, and Boolean Models. Annals of Operations Research, 188.

Boros, E., Crama, Y., Hammer, P. L., Ibaraki, T., Kogan, A., & Makino, K. (2011). Logical Analysis of Data: Classification with justification. Annals of Operations Research, 188, 33-61. doi:10.1007/s10479-011-0916-1

Crama, Y., & Hammer, P. L. (2011). Boolean Functions: Theory, Algorithms, and Applications. New York, United States - New York: Cambridge University Press.

Crama, Y., & Chevalier, P. (October 2010). Operations Research for the steel industry : the art of combining science and knowledge. Paper presented at International Workshop on Optimization, Saint-Denis, France.

Bay, M., Crama, Y., Langer, Y., & Rigo, P. (September 2010). Space and time allocation in a shipyard assembly hall. Annals of Operations Research, 179 (1), 57-76. doi:10.1007/s10479-008-0461-8

Crama, Y., & Gultekin, H. (June 2010). Throughput optimization in two-machine flowshops with flexible operations. Journal of Scheduling, 13 (3), 227-243. doi:10.1007/s10951-008-0096-2

Crama, Y. (06 May 2010). Challenging Combinatorial Problems. Paper presented at Francqui Chair Lecture, Leuven, Belgium.

Crama, Y. (29 April 2010). Functions of Binary Variables and Nonlinear 0-1 Optimization. Paper presented at Francqui Chair Lecture, Leuven, Belgium.

Crama, Y. (22 April 2010). High Multiplicity Scheduling Problems and Just-In-Time Scheduling. Paper presented at Francqui Chair Lecture, Leuven, Belgium.

Crama, Y. (01 April 2010). Combinatorial Optimization Models in Automated Manufacturing. Paper presented at Francqui Chair Lecture, Leuven, Belgium.

Crama, Y. (25 March 2010). Logical Analysis of Data and Classification. Paper presented at Francqui Chair Lecture, Leuven, Belgium.

Crama, Y. (18 March 2010). Control and Voting Power in Shareholding Networks. Paper presented at Francqui Chair Lecture, Leuven, Belgium.

Crama, Y. (15 March 2010). Models for Decision Making: From Applications to Mathematics... and Back. Paper presented at Francqui Chair Inaugural Lecture, Leuven, Belgium.

Amand, G., Arda, Y., Crama, Y., Kronus, D., & Pironet, T. (29 January 2010). Vehicle loading optimization with stochastic supply. Paper presented at ORBEL 24 - 24th annual conference of the Belgian Operational Research Society, Liège, Belgium.

Crama, Y., & Hammer, P. L. (Eds.). (2010). Boolean Models and Methods in Mathematics, Computer Science, and Engineering. New York, United States - New York: Cambridge University Press.

Schyns, M., Crama, Y., & Hübner, G. (2010). Optimal selection of a portfolio of options under Value-at-Risk constraints: a scenario approach. Annals of Operations Research, 181, 683-708. doi:10.1007/s10479-009-0636-y

Pironet, T., Crama, Y., Arda, Y., Schyns, M., Rosso, V., Kronus, D., Wauthelet, Y., Lange, J.-C., & Tran, V. (2009). RAPPORT DE RECHERCHE SUR UNE APPLICATION DE GESTION DE LA COLLABORATION DU SERVICE EXPÉDITION DU CHARGEUR AVEC LE TRANSPORTEUR. -.

Amand, G., Arda, Y., Crama, Y., Kronus, D., & Pironet, T. (07 July 2009). Vehicle loading optimization with stochastic supply. Paper presented at EURO 2009 - 23rd European Conference on Operational Research, Bonn, Germany.

Bay, M., Crama, Y., & Rigo, P. (2009). Local search heuristics for large-scale discrete structural optimization with expensive black-box evaluations. Liège, Belgium: ULg - Université de Liège.

Pironet, T., Crama, Y., Arda, Y., Schyns, M., Rosso, V., & Kronus, D. (2009). RAPPORT INTERNE : REVUE DE LITTERATURE SUR LA GESTION DES RESSOURCES RÉUTILISABLES ET DES MÉTHODES D’OPTIMISATION. RW.

Schyns, M., Hübner, G., & Crama, Y. (2009). Alternative to the Mean-Variance Asset Allocation Analysis: A Scenario Methodology for Portfolio Selection. In G. N. Gregoriou (Ed.), Stock Market Volatility (pp. 231-254). Boca Raton, United States: Taylor & Francis Group. doi:10.1201/9781420099553-18

Pironet, T., Crama, Y., Arda, Y., Schyns, M., Rosso, V., & Kronus, D. (2009). RAPPORT DE RECHERCHE SUR L’OPTIMISATION DU ROUTAGE ET DU CHARGEMENT DE VEHICULES.

Crama, Y., Leruth, L., & Wang, S. (2009). A Markov chain model of power indices in corporate structures. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/178393.

Arda, Y., Crama, Y., & Pironet, T. (26 February 2008). Un problème de chargement/déchargement profitable d'une flotte de véhicules soumise à des fenêtres de temps. Paper presented at ROADEF 08 - 9e Congrès de la Société Française de Recherche Opérationnelle et d’Aide à la Décision, Clermont-Ferrand, France.

Arda, Y., Crama, Y., & Pironet, T. (18 January 2008). A profitable pickup and delivery problem with time windows. Paper presented at ORBEL 22 - 22nd annual conference of the Belgian Operational Research Society, Brussels, Belgium.

Adem, J., Crama, Y., Gochet, W., & Spieksma, F. C. R. (2008). Counting and enumerating aggregate classifiers. Discrete Applied Mathematics, 156 (3), 2459-2468. doi:10.1016/j.dam.2008.01.017

Bair, J., & Crama, Y. (2008). Modèles et données dans l’univers économique. In D. Justens (Ed.), Attentes d'un modèle (pp. 45-61). Liège, Belgium: Céfal.

Boros, E., Brualdi, R., Crama, Y., & Hoffman, A. (2008). Geršgorin variations III: On a theme of Brualdi and Varga. Linear Algebra and its Applications, 428, 14-19. doi:10.1016/j.laa.2007.10.003

Chapelle, A., Crama, Y., Hübner, G., & Peters, J.-P. (2008). Practical methods for measuring and managing operational risk in the financial sector: A clinical study. Journal of Banking and Finance, 32, 1049-1061. doi:10.1016/j.jbankfin.2007.09.017

Crama, Y., Moonen, L. S., Spieksma, F. C., & Talloen, E. (16 October 2007). The tool switching problem revisited. European Journal of Operational Research, 182 (2), 952-957. doi:10.1016/j.ejor.2006.07.028

Crama, Y., & Leruth, L. (01 May 2007). Control and voting power in corporate networks: Concepts and computational aspects. European Journal of Operational Research, 178 (3), 879-893. doi:10.1016/j.ejor.2006.02.020

Bay, M., Crama, Y., Richir, T., & Rigo, P. (2007). A mixed-integer heuristic for the structural optimization of a cruise ship. In COMPIT 2007 , Cortona, Italy.

Boros, E., Crama, Y., & Simeone, B. (April 2007). Peter Ladislaw Hammer (1936-2006). 4OR: A Quarterly Journal of Operations Research, 5 (1), 1-4. doi:10.1007/s10288-007-0034-8

Brauner, N., Crama, Y., Grigoriev, A., & van de Klundert, J. (February 2007). Multiplicity and complexity issues in contemporary production scheduling. Statistica Neerlandica, 61 (1), 75-91. doi:10.1111/j.1467-9574.2007.00362.x

Langer, Y., Bay, M., Crama, Y., Bair, F., Caprace, J.-D., & Rigo, P. (July 2005). Optimization of Surface Utilization Using Heuristic Approaches. Ship Technology Research, 52 (3), 141-147.

Brauner, N., Crama, Y., Grigoriev, A., & van de Klundert, J. (May 2005). A framework for the complexity of high-multiplicity scheduling problems. Journal of Combinatorial Optimization, 9 (3), 313-323. doi:10.1007/s10878-005-1414-7

Langer, Y., Bay, M., Crama, Y., Bair, F., Caprace, J.-D., & Rigo, P. (2005). Optimization of Surface Allocation using Heuristic Approaches. In COMPIT 2005 , Hambourg, Germany (Edt V Bertram, pp. 9).

Schyns, M., Crama, Y., & Hübner, G. (2005). Grafting Information in Scenario Trees: Application to Option Prices. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/117269.

Alexe, G., Alexe, S., Crama, Y., Foldes, S., Hammer, P. L., & Simeone, B. (30 December 2004). Consensus algorithms for the generation of all maximal bicliques. Discrete Applied Mathematics, 145 (1 Sp. Iss. SI), 11-21. doi:10.1016/j.dam.2003.09.004

Crama, Y., Pascual, R., & Torres, A. (01 December 2004). Optimal procurement decisions in the presence of total quantity discounts and alternative product recipes. European Journal of Operational Research, 159 (2), 364-378. doi:10.1016/j.ejor.2003.08.021

Brauner, N., & Crama, Y. (05 January 2004). The maximum deviation just-in-time scheduling problem. Discrete Applied Mathematics, 134 (1-3), 25-50. doi:10.1016/S0166-218X(03)00222-1

Crama, Y., & Schyns, M. (01 November 2003). Simulated annealing for complex portfolio selection problems. European Journal of Operational Research, 150 (3), 546-571. doi:10.1016/S0377-2217(02)00784-1

Brauner, N., Crama, Y., Finke, G., Lemaire, P., & Wynants, C. (2003). Approximation algorithms for the design of SDH/SONET networks. RAIRO: Recherche Opérationnelle, 37 (4, OCT-DEC), 235-247. doi:10.1051/ro:2004003

Crama, Y., Leruth, L., Renneboog, L., & Urbain, J.-P. (2003). Corporate control concentration measurement and firm performance. In J. A. Batten & T. A. Fetherston (Eds.), Social Responsibility: Corporate Governance Issues (pp. 123-149). Elsevier.

Crama, Y., van de Klundert, J., & Spieksma, F. C. (15 November 2002). Production planning problems in printed circuit board assembly. Discrete Applied Mathematics, 123 (1-3), 339-361. doi:10.1016/S0166-218X(01)00345-6

Crama, Y., & Hammer, P. L. (2002). Pseudo-Boolean optimization. In M. G. C. Resende & P. M. Pardalos (Ed.), Handbook of Applied Optimization (pp. 445-450). Oxford University Press.

Crama, Y., Pochet, Y., & Wera, Y. (2001). A discussion of production planning approaches in the process industry. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/217621.

Boros, E., Crama, Y., Ekin, O., Hammer, P. L., Ibaraki, T., & Kogan, A. (2000). Boolean normal forms, shellability and reliability computations. SIAM Journal on Discrete Mathematics, 13, 212-226. doi:10.1137/S089548019732180X

Crama, Y., Kats, V., Van de Klundert, J., & Levner, E. (2000). Cyclic scheduling in robotic flowshops. Annals of Operations Research, 96, 97-124. doi:10.1023/A:1018995317468

Crama, Y., & Van de Klundert, J. (1999). Worst-case performance of approximation algorithms for tool management problems. Naval Research Logistics, 46, 445-462. doi:10.1002/(SICI)1520-6750(199908)46:5<445::AID-NAV1>3.0.CO;2-R

Crama, Y., & Van de Klundert, J. (1999). Cyclic scheduling in 3-machine robotic flow shops. Journal of Scheduling, 2, 35-54. doi:10.1002/(SICI)1099-1425(199901/02)2:1<35::AID-JOS15>3.0.CO;2-J

Crama, Y. (1997). Combinatorial optimization models for production scheduling in automated manufacturing systems. European Journal of Operational Research, 99, 136-153. doi:10.1016/S0377-2217(96)00388-8

Crama, Y., Dupont, L., & Finke, G. (1997). Recherche opérationnelle et gestion de la production. Nouvelles de la Science et des Technologies, 15, 37-45.

Crama, Y., Ekin, O., & Hammer, P. L. (1997). Variable and term removal from Boolean formulae. Discrete Applied Mathematics, 75, 217-230. doi:10.1016/S0166-218X(96)00028-5

Crama, Y., Flippo, O. E., Van de Klundert, J., & Spieksma, F. C. R. (1997). The assembly of printed circuit boards: A case with multiple machines and multiple board types. European Journal of Operational Research, 98, 457-472. doi:10.1016/S0377-2217(96)00228-7

Crama, Y., & Ibaraki, T. (1997). Hitting or avoiding balls in Euclidean space. Annals of Operations Research, 69, 47-64. doi:10.1023/A:1018901600127

Crama, Y., & Oosten, M. (1997). The polytope of block diagonal matrices and complete bipartite partitionings. Networks, 30, 263-282. doi:10.1002/(SICI)1097-0037(199712)30:4<263::AID-NET4>3.0.CO;2-H

Crama, Y., & Van de Klundert, J. (1997). Robotic flowshop scheduling is strongly NP-complete. In W. K. Klein Haneveld, O. J. Vrieze, ... L. C. M. Kallenberg (Eds.), Ten Years LNMB (pp. 277-286). Amsterdam, Netherlands: CWI.

Crama, Y., & Van de Klundert, J. (1997). Cyclic scheduling of identical parts in a robotic cell. Operations Research, 45, 952-965. doi:10.1287/opre.45.6.952

Crama, Y., Flippo, O. E., Van de Klundert, J., & Spieksma, F. C. R. (1996). The component retrieval problem in printed circuit board assembly. International Journal of Flexible Manufacturing Systems, 8, 287-312. doi:10.1007/BF00170016

Crama, Y., Oerlemans, A. G., & Spieksma, F. C. R. (1996). Production Planning in Automated Manufacturing. (Second, revised and enlarged edition. (First edition: 1994)). Springer Science & Business Media B.V. doi:10.1007/978-3-642-80270-6

Crama, Y., & Oosten, M. (1996). Models for machine-part grouping in cellular manufacturing. International Journal of Production Research, 34, 1693-1713. doi:10.1080/00207549608904991

Crama, Y., & Spieksma, F. C. R. (1996). Scheduling jobs of equal length: complexity, facets and computational results. Mathematical Programming, 72, 207-227. doi:10.1007/BF02592090

Crama, Y., Hansen, P., & Jaumard, B. (1995). Complexity of product positioning and ball intersection problems. Mathematics of Operations Research, 20, 885-894. doi:10.1287/moor.20.4.885

Crama, Y., Kolen, A. W. J., & Pesch, E. (1995). Local search in combinatorial optimization. In P. J. Braspenning, F. Thuijsman, ... A. J. M. M. Weijters (Eds.), Artificial Neural Networks : An Introduction to ANN Theory and Practice (pp. 157-174). Berlin Heidelberg, Germany: Springer-Verlag. doi:10.1007/BFb0027029

Crama, Y., & Mazzola, J. B. (1995). Valid inequalities and facets for a hypergraph model of the nonlinear knapsack and FMS part-selection problems. Annals of Operations Research, 58, 99-128. doi:10.1007/BF02032163

Bandelt, H.-J., Crama, Y., & Spieksma, F. C. R. (1994). Approximation algorithms for multi-dimensional assignment problems with decomposable costs. Discrete Applied Mathematics, 49, 25-50. doi:10.1016/0166-218X(94)90199-6

Bels, V., & Crama, Y. (1994). Quantitative-analysis of the courtship and mating-behavior in the loggerhead musk turtle Sternotherus-Minor (Reptilia, Kinosternidae) with comments on courtship behavior in turtles. Copeia, 1994 (3), 676-684. doi:10.2307/1447183

Boros, E., Crama, Y., Hammer, P. L., & Saks, M. (1994). A complexity index for satisfiability problems. SIAM Journal on Computing, 23, 45-49. doi:10.1137/S0097539792228629

Crama, Y., Kolen, A. W. J., Oerlemans, A. G., & Spieksma, F. C. R. (1994). Minimizing the number of tool switches on a flexible machine. International Journal of Flexible Manufacturing Systems, 6, 33-54. doi:10.1007/BF01324874

Crama, Y., & Mazzola, J. B. (1994). On the strength of relaxations of multidimensional knapsack problems. INFOR : Information systems and operational research, 32, 219-225. doi:10.1080/03155986.1994.11732252

Crama, Y., & Oerlemans, A. G. (1994). A column generation approach to job grouping for flexible manufacturing systems. European Journal of Operational Research, 78, 58-80. doi:10.1016/0377-2217(94)90122-8

Crama, Y., Oerlemans, A. G., & Spieksma, F. C. R. (1994). Production Planning in Automated Manufacturing. (First edition. (Second, revised and enlarged edition: 1996)). Berlin, Heidelberg - New York, Germany: Springer-Verlag.

Crama, Y., & Van de Klundert, J. (1994). Approximation algorithms for integer covering problems via greedy column generation. RAIRO: Recherche Opérationnelle, 28, 283-302.

Crama, Y. (1993). Concave extensions for nonlinear 0-1 maximization problems. Mathematical Programming, 61, 53-60. doi:10.1007/BF01582138

Boros, E., Crama, Y., & Hammer, P. L. (1992). Chvátal cuts and odd cycle inequalities in quadratic 0-1 optimization. SIAM Journal on Discrete Mathematics, 5, 163-177. doi:10.1137/0405014

Crama, Y., Loebl, M., & Poljak, S. (1992). A decomposition of strongly unimodular matrices into incidence matrices of digraphs. Discrete Mathematics, 102, 143-147. doi:10.1016/0012-365X(92)90048-K

Crama, Y., & Spieksma, F. C. R. (1992). The complexity of scheduling short tasks with few starting times. Eprint/Working paper retrieved from https://orbi.uliege.be/2268/138861.

Crama, Y., & Spieksma, F. C. R. (1992). Approximation algorithms for three-dimensional assignment problems with triangle inequalities. European Journal of Operational Research, 60, 273-279. doi:10.1016/0377-2217(92)90078-N

Crama, Y., Hansen, P., & Jaumard, B. (1991). Detection of spurious states of neural networks. IEEE Transactions on Neural Networks, 2, 165-168. doi:10.1109/72.80307

Benzaken, C., Crama, Y., Duchet, P., Hammer, P. L., & Maffray, F. (1990). More characterizations of triangulated graphs. Journal of Graph Theory, 14 (4), 413-422. doi:10.1002/jgt.3190140404

Boros, E., Crama, Y., & Hammer, P. L. (1990). Upper-bounds for quadratic 0-1 maximization. Operations Research Letters, 9, 73-79. doi:10.1016/0167-6377(90)90044-6

Boros, E., Crama, Y., & Hammer, P. L. (1990). Polynomial-time inference of all valid implications for Horn and related formulae. Annals of Mathematics and Artificial Intelligence, 1, 21-32. doi:10.1007/BF01531068

Crama, Y., Hammer, P. L., & Ibaraki, T. (1990). Packing, covering and partitioning problems with strongly unimodular constraint matrices. Mathematics of Operations Research, 15, 258-267. doi:10.1287/moor.15.2.258

Crama, Y., Hansen, P., & Jaumard, B. (1990). The basic algorithm for pseudo-Boolean programming revisited. Discrete Applied Mathematics, 29, 171-185. doi:10.1016/0166-218X(90)90142-Y

Crama, Y., Kolen, A. W. J., Oerlemans, A. G., & Spieksma, F. C. R. (1990). Throughput rate optimization in the automated assembly of printed circuit boards. Annals of Operations Research, 26, 455-480.

Crama, Y. (1989). Recognition problems for special classes of polynomials in 0-1 variables. Mathematical Programming, 44, 139-155. doi:10.1007/BF01587085

Crama, Y., & Hammer, P. L. (1989). Recognition of quadratic graphs and adjoints of bidirected graphs. In G. S. Bloom, R. L. Graham, ... J. Malkevitch (Eds.), Combinatorial Mathematics : Proceedings of the Third International Conference (pp. 140-149). New York Academy of Sciences. doi:10.1111/j.1749-6632.1989.tb22445.x

Crama, Y., & Hammer, P. L. (1989). Bimatroidal independence systems. Zeitschrift für Operations-Research, 33, 149-165. doi:10.1007/BF01423645

Crama, Y., Hammer, P. L., & Holzman, R. (1989). A characterization of a cone of pseudo-Boolean functions via supermodularity-type inequalities. In P. Kall, J. Kohlas, W. Popp, ... C. A. Zehnder (Eds.), Quantitative Methoden in den Wirtschaftswissenschaften (pp. 53-55). Berlin Heidelberg, Germany: Springer-Verlag. doi:10.1007/978-3-642-74306-1

Crama, Y., & Ibaraki, T. (1988). Cause-effect relationships and partially defined Boolean functions. Annals of Operations Research, 16, 299-326. doi:10.1007/BF02283750

Crama, Y. (1987). Dualization of regular boolean functions. Discrete Applied Mathematics, 16, 79-85. doi:10.1016/0166-218X(87)90056-4

Crama, Y., Hammer, P. L., Jaumard, B., & Simeone, B. (1987). Product form parametric representation of the solutions to a quadratic boolean equation. RAIRO: Recherche Opérationnelle, 21, 287-306. doi:10.1051/ro/1987210402871

Crama, Y., Hammer, P. L., & Ibaraki, T. (1986). Strong unimodularity for matrices and hypergraphs. Discrete Applied Mathematics, 15, 221-239. doi:10.1016/0166-218X(86)90044-2

Crama, Y., Defourny, J., & Gazon, J. (1984). Structural decomposition of multipliers in input-output or social accounting matrix analysis. Économie Appliquée, 37, 215-222.

Crama, Y. (1983). Analysis of STEM-like solutions to multi-objective programming problems. In R. Hartley, L. C. Thomas, D. J. White, ... S. French (Ed.), Multi-Objective Decision Making (pp. 207-213). London, United Kingdom: Academic Press.

Crama, Y., & Hansen, P. (1983). An introduction to the ELECTRE research programme. In P. Hansen, Essays and Surveys on Multiple Criteria Decision Making (pp. 31-42). Berlin Heidelberg, Germany: Springer-Verlag. doi:10.1007/978-3-642-46473-7_4

Crama, Y., & Pestieau, P. (1982). Transmission and distribution of wealth with a variable number of children. Economics Letters, 10 (1-2), 193-196. doi:10.1016/0165-1765(82)90136-7