1. Bartolini, S. (2006) Should the union be ‘politicised’? Prospects and risks. Notre Europe Policy Paper 19: 29–50.
2. Bartsch, S. (2007) Politische stiftungen. In: S. Schmidt, G. Hellmann and R. Wolf (eds.) Handbuch Zur Deutschen Aussenpolitik. Wiesbaden: VS Verlag für Sozialwissenschaften, pp. 280–289.
3. CES. (2011) By-laws of the non-profit association. Centre for European Studies,
http://thinkingeurope.eu/sites/default/files/laws.pdf
, accessed 10 June 2011.
4. Cordery, P. (2011) Interview with PES Secretary General. 21 May 2011, Brussels.
5. Cremers, J. (2013) Interview with EGP Secretary General. 1 February 2013, Brussels.