1. Bale, T., & Dunphy, R. (2011). In from the cold? Left parties and government involvement since 1989. Comparative European Politics, 9(3), 269–291.
2. Bardi, L., Bressanelli, E., Calossi, E., Gagatek, W., Mair, P., & Pizzimenti, E. (2010). How to create a transnational party system (European Democracy Observatory Study). European Parliament.
3. Bardi, L., Bressanelli, E., Calossi, E., Gagatek, W., Mair, P., & Pizzimenti, E. (2014). Political parties and political foundations at European Level: Challenges and opportunities (European Democracy Observatory Report, 2014/08). European University Institute.
4. Bieler, A., & Erne, R. (2014). Transnational solidarity? The European working class in the Eurozone crisis. Socialist Register, 51(1).
5. Bieler, A., Hilary, J., & Lindberg, I. (2014). Trade unions, ‘free trade’, and the problem of transnational solidarity: An introduction. Globalizations, 11(1), 1–9.