1. Béthouart, Bruno. “Entry of the Catholics into the Republic: The Mouvement Républicain Populaire in France.” In Christian Democracy in Europe since 1945, edited by Michael Gehler and Wolfram Kaiser. London: Routledge, 2004. 85–100.
2. Bösch, Frank. Die Adenauer-CDU: Gründung, Aufstieg und Krise einer Erfolgspartei 1945–1989. Stuttgart: DVA, 2001.
3. Chenaux, Philippe. Une Europe Vaticane? Entre le Plan Marshall et les Traités de Rome. Brussels: Éditions Ciaco, 1990.
4. Conway, Martin. “Belgium.” In Political Catholicism in Europe 1918–1965, edited by Martin Conway and Tom Buchanan. Oxford: Oxford University Press, 1996. 187–218.
5. Conway, Martin. “The Rise and Fall of Western Europe’s Democratic Age 1945–73.” Contemporary European History 13, no. 1 (2004): 67–88.