1Herbert Kitschelt,the Logic of Party Formation,Ithaca,NY:Cornell University Press,1989.
2European Federation of Green Parties,the Guiding Principles of the European Federation of Green Parties,Brussels:Information Office EP-BEL,1993,Sec I.1.
3Eugene Frankland and Donald Schoonmaker,Between Protest and Power:the Green Party in Germany,Boulder,Colo.:West-view,1992,p.105.