//-->
European elections by direct suffrage : a comparative study of the electoral systems used in Western Europe and their utility for the direct election of a European parliament
Birke, Wolfgang, (1961)
The European Parliament : a guide for the European elections
Jackson, Robert Victor, (1979)
Nationale Wahlgesetze für die Direktwahl : vom Dt. Bundestag u.d. Brit. Parlament verabschiedete Gesetzestexte
(1978)