Billen, R., Clementini, E., Étude des caractéristiques projectives des objets spatiaux et de leurs relations (2004) Revue Internationale de Géomatique, 14, pp. 145-165
Billen, R., Clementini, E., A model for ternary projective relations between regions (2004) EDBT2004 - 9th International Conference on Extending DataBase Technology, pp. 310-328. , Heraklion-Crete, Greece
Clementini, E., Di Felice, P., Spatial operators (2000) ACM SIGMOD Record, 29, pp. 31-38
Dugat, V., Gambarotto, P., Larvor, Y., Qualitative theory of shape and orientation (1999) Proc. of the 16th Int. Joint Conference on Artificial Intelligence (IJCAI'99), pp. 45-53. , Stockolm, Sweden
Gapp, K.-P., From vision to language: A cognitive approach to the computation of spatial relations in 3D space (1994) Proc. of the First European Conference on Cognitive Science in Industry, pp. 339-357. , Luxembourg
Goyal, R., Egenhofer, M.J., (2000) Cardinal Directions between Extended Spatial Objects, , http://www.spatial.maine.edu/~max/RJ36.html
Kulik, L., Eschenbach, C., Habel, C., Schmidtke, H.R., A graded approach to directions between extended objects (2002) Proc. of the 2nd Int. Conf. on Geographic Information Science, pp. 119-131. , Boulder, CO
Pomerantz, J.R., Portillo, M.C., Jewell, S.W., Agrawal, A., The genesis of perceptual organization: Basic emergent features in vision (2003) 44th Annual Meeting of the Psychonomic Society, , Vancouver, British Columbia
Portillo, M.C., Pomerantz, J.R., Zimmerman, S., Evaluating grouping via emergent features: A systematic approach (2005) Fifth Annual Meeting of the Vision Science Society, , Sarasota, FL
Vorwerg, C., Socher, G., Fuhr, T., Sagerer, G., Rickheit, G., Projective relations for 3D space: Computational model, application, and psychological evaluation (1997) Proc. of the 14th Nat. Conf. on Artificial Intelligence and 9th Innovative Applications of Artificial Intelligence Conf., AAAI 97, IAAI 97, pp. 159-164. , Providence, RI
