↑ Raymond F. Mikesell, The Lessons of Benelux and the European Coal and Steel Community for the European Economic Community, The American Economic Review, Vol. 48, No. 2, Papers and Proceedings of the Seventieth Annual Meeting of the American Economic Association (May, 1958), pp. 428-441
1 2 3 Hoskyns, Catherine; Michael Newman (2000). Democratizing the European Union: Issues for the twenty-first Century (Perspectives on Democratization. Manchester University Press. ISBN978-0719056666. Chú thích sử dụng tham số |coauthors= bị phản đối (trợ giúp)
