1. Achen, C. H. & Shively, W. P. (1995). Cross‐Level Inference. Chicago: Chicago University Press.
2. Aitkin, D. (1985). Australia. In I. Crewe & D. T. Denver (Hrsg.), Electoral Change in Western Democracies. Patterns and Sources of Electoral Volatility (S. 75–99). London: Croom Helm.
3. Allum, P. & Mannheimer, R. (1985). Italy. In I. Crewe & D. T. Denver (Hrsg.), Electoral Change in Western Democracies. Patterns and Sources of Electoral Volatility (S. 287–318). London: Croom Helm.
4. Ascher, W. & Tarrow, S. (1975). The Stability of the Communist Electorates: Evidence from a Longitudinal Analysis of French and Italian Aggregate Data. The American Journal of Political Science, 19, 475–499.
5. Bartolini, S. & Mair, P. (1990). Identity, Competition, and Electoral Availibility: The Stabilisation of European Electorates 1885–1985. Cambridge u. a.: Cambridge University Press.