„Populist Parties and Political Involvement: European Research and Results“, in: Marcel A. Niggli (Hrsg.), Right-wing Extremism in Switzerland, Baden-Baden (Nomos), 2009, S. 68-77.

Grumke, Thomas (2009) „Populist Parties and Political Involvement: European Research and Results“, in: Marcel A. Niggli (Hrsg.), Right-wing Extremism in Switzerland, Baden-Baden (Nomos), 2009, S. 68-77. ,