1. Change and Continuity in the 1996 Elections;Abramson,1998
2. Comparative Political Data Set 1960–2008. Institute of Political Science;Armingeon,2010
3. Generations and value change;Becker,1995
4. Defining and Measuring Democracy;Beetham,1995
5. Overreporting voting – why it happens and why it matters;Bernstein;Public Opinion Quarterly,2001