Kortmann, Matthias. “Countering Integration Pessimists: New Differentiation for the Integration Debates”. BMGN - Low Countries Historical Review 127, no. 3 (October 1, 2012): 74–82. Accessed November 21, 2024. https://bmgn-lchr.nl/article/view/urn%3Anbn%3Anl%3Aui%3A10-1-109842.