Budge I., Keman H. (1990), Parties and democracy: Coalition formation and government functioning in twenty states. Oxford: Oxford University Press.
Camia V., Caramani D. (2012), ‘Family meetings: Ideological convergence within party families across Europe, 1945–2009’, Comparative European Politics 10, pp. 48–85. Retrieved from https://doi.org/10.1057/cep.2011.1
Close C. (2018), ‘Parliamentary party loyalty and party family: The missing link?’, Party Politics 24(2), pp. 209–219.
De Winter L. (ed.). (2000), Liberalism and liberal parties in the European Union. Barcelona: Institut de Ciencies Politiques i Socials.
De Winter L., Marcet J. (2000), ‘Liberalism and liberal parties in the European Union’. In: De Winter L. (ed.), Liberalism and liberal parties in the European Union. Barcelona: Institut de Ciencies Politiques i Socials, pp. 11–24.
Delwit P. (ed.). (2002a), Liberalismes et partis liberaux en Europe. Brussels: Editions de l’Universite de Bruxelles.
Delwit P. (2002b), ‘Le liberalisme politique: Une famille politique complexe’. In: Delwit P. (ed.), Liberalismes et partis liberaux en Europe. Brussels: Editions de l’Universite de Bruxelles, pp. 7–15.
Dinas E., Gemenis K. (2010), ‘Measuring parties’ ideological positions with manifesto data. A Critical evaluation of the competing methods’, Party Politics 16, pp. 427–450. Retrieved from https://doi.org/10.1177/1354068809343107
Elff M. (2013), ‘On the distinctiveness of party families’, Presented at the 71th Annual Conference of the Midwest Political Science Association, Chicago.
Ennser L. (2012), ‘The homogeneity of West European party families. The radical right in comparative perspective’, Party Politics 18, pp. 151–171. Retrieved from https://doi.org/10.1177/1354068810382936
Enyedi Z., Linek L. (2008), ‘Searching for the right organization. Ideology and party structure in East-Central Europe’, Party Politics 14, pp. 455–477.
Freire A., Tsatsanis E. (2015), ‘Party families, ideological distinctiveness and cohesion: A strong test of the heuristics of the concept of “familles spirituelles”’, Presented at the ECPR General Conference, Montreal.
Katz R.S., Mair P. (eds.). (1994), How parties organize. Change and adaptation in party organizations in western democracies. London: Sage Publications.
Kirchner E.J. (ed.). (1988), Liberal parties in Western Europe. Cambridge: Cambridge University Press.
Klingemann H.-D., Volkens A., Bara J., Budge I., McDonald M.D. (2006), Mapping policy preferences II: Estimates for parties, electors, and governments in Eastern Europe, European Union, and OECD 1990–2003. Oxford: Oxford University Press.
Knutsen O. (2008), Class voting in Western Europe. A comparative longitudinal study. Plymouth, MA: Lexington Books.
Kriesi H., Grande E., Lachat R., Dolezal M., Bornschier S., Frey T. (2006), ‘Globalization and the transformation of the national political space: Six European countries compared’, European Journal of Political Research 45, pp. 921–956.
Laver M., Hunt W.B. (1992), Policy and party competition. London: Routledge.
Lipset S.M., Rokkan S. (1967), Party systems and voter alignments: Cross-national perspectives. New York: Free Press.
Mair P., Mudde C. (1998), ‘The party family and its study’, Annual Review of Political Science 1, pp. 211–229. Retrieved from https://doi.org/10.1146/annurev.polisci.1.1.211
Marks G., Wilson C.J., Ray L. (2002), ‘National political parties and European integration’, American Journal of Political Science 46, pp. 585–594. Retrieved from https://doi.org/10.2307/3088401
Pedersen M.N. (1982), ‘Towards a new typology of party lifespans and minor parties’, scandinavian political studies 5, pp. 1–16. Retrieved from https://doi.org/10.1111/j.1467-9477.1982.tb00256.x
Poguntke T., Scarrow S.E., Webb P.D. (2016), ‘Party rules, party resources, and the politics of parliamentary democracies: How parties organize in the 21st century’, Party Politics 22, pp. 661–678.
Roussellier N. (1991), L’Europe des liberaux. Paris: Editions Complexe.
Scarrow S.E., Webb P.D., Poguntke T. (eds.). (2017), Organizing political parties: Representation, participation, and power, comparative politics. Oxford: Oxford University Press.
Seiler D.-L. (1980), Partis et familles politiques. Paris: P.U.F.
Seiler D.-L. (2002), Le paradoxe liberal: La faiblesse d’une force d’avenir. In: Delwit P. (ed.), Liberalismes et partis liberaux en Europe. Brussels: Editions de l’Universite de Bruxelles, pp. 37–56.
Smith G. (1988), ‘Between left and right: The ambivalence of European liberalism’. In: Kirchner E.J. (Ed.), Liberal parties in Western Europe. Cambridge: Cambridge University Press, pp. 16–28.
van der Brug W., Hobolt S.B., De Vreese C.H. (2009), ‘Religion and party choice in Europe’, West European Politics 32, pp. 1266–1283.
van Haute E. (ed.). (2016), Green parties in Europe. London & New York: Routledge.
Vandermotten C., Medina Lockhart P. (2002), ‘La geographie du liberalisme belge et europeen’. In: Delwit P. (ed.), Liberalismes et partis liberaux en Europe. Brussels: Editions de l’Universite de Bruxelles, pp. 57–74.