in T. Poguntke, P. D. Webb (a cura di), The Presidentialization of Politics: A Comparative Study of Modern Democracies, Oxford, Oxford University Press, 2005.
International Political Science Review, 5, 2008, 595-618.
Beihefte zur Rechtstheorie, Supplements to Legal Theory, Duncker & Humblot, 2002.
West European Politics, 4, 1993, 545-560.
in F. Barbagallo (a cura di), Storia dell’Italia repubblicana, II Tomo, III Vol., Torino, Einaudi, 1997.
Rivista italiana di scienza politica, 2, 2003, 257-284
Political Science Quarterly, 109, 3, 1994, 441-460.
Storia amministrazione costituzione, Annale Isap, 1994, 2, 151-171
International Political Science Review, 2, 2000, 283-310.












