6Herbert Kitschelt, Zdenka Mansfeldova, Radoslav Markowski and Gabor Toka. Post communist Party Systems(Cambridge, Cambridge University Press, 1999),p.1.
7Robert Michel, Political Parties: A Sociological Study of the Oligarchical Tendencies of Modern Democracies (New York, Press,1962).
8See Richard Sakwa: Russian Politics and Society(Third Edition), 2002 London and New York,p.185.
9See Richard Sakwa: Russian Politics and Society(Third Edition), 2002 London and New York,p. 166.
10See Richard Sakwa: Russian Politics and Society(Third Edition), 2002 London and New York,p. 184.
