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3. Committee on Constitutional Affairs Report 2007/2169(INI) of 3 October 2007 on the composition of the European Parliament.
4. Committee on Constitutional Affairs Report 2012/2309(INI) of 25 February 2013 on the composition of the European Parliament with a view to the 2014 elections.
5. Delgado-Márquez, B., Kaeding, M., & Palomares, A. (2013). A more balanced composition of the European Parliament with degressive proportionality. European Union Politics, 14, 458–471.