CaramaniD (2004) The Nationalization of Politics: The Formation of National Electorates and Party Systems in Western Europe. Cambridge: Cambridge University Press.
2.
LipsetSMRokkanS (1967) Cleavage structures, party systems, and voter alignments: an introduction. In: LipsetSMRokkanS (eds), Party Systems and Voter Alignments: Cross-National Perspectives. New York: Free Press, pp. 1–64.