1. Abt, K. and Rummens, S. (2007) Populism versus democracy. Political Studies 55: 405–424.
2. Art, D. (2007) Reacting to the radical right. Party Politics 13 (3): 331–349.
3. Backes, U. and Moreau, P. (1994) Die Extreme Rechte in Deutschland. Munich, Germany: Akademischer Verlag.
4. Baldini, G. (2001) Comparative Mapping of Extreme Right Electoral Dynamics: An Overview. Report, http://www.essex.ac.uk/ECPR/publications/eps/onlineissues/autumn2001/research_extreme.htm , accessed 10 May 2010.
5. Caldiron, G. (2001) La destra plurale. Rome: Manifestolibri.