1. Party and Society. The Anglo-American Democracies;Alford,1963
2. When politics and models collide: estimating models of multiparty elections;Alvarez;American Journal of Political Science,1998
3. Party Policy in Modern Democracies;Benoit,2006
4. Political Parties in Western Democracies;von Beyme,1985
5. Expository note: the Downsian model predicts divergence;Berger;Journal of Theoretical Politics,2000