1. Anne O. Krueger, “Free Trade Agreements as Protectionistic Devices: Rules of Origin,” in Trade, Theory, and Econometrics: Essays in Honor of John C. Chipman, herausgegeben von James R. Melvin, James C. Moore und Raymond Riezman (New York: Routledge, 1999), 91–101.
2. European Parliamentary Research Service, Customs unions and FTAs Debate with respect to EU neighbours (2017).
3. Fritz Machlup, Economic Integration Worldwide, Regional, Sectoral: Proceedings of the Fourth Congress of the International Economic Assoiation held in Budapest, Hungary (London: Macmillan, 1976).
4. Jacob Viner, “Adam Smith and Laissez-Faire,” in Adam Smith 1776-1926: Lectures to Commemorate the Sesquicentennial of the Publication of the Wealth of Nation, herausgegeben von John M. Clark, Paul H. Douglas, Jacob H. Hollander, Glenn R. Morrow und Jacob Viner (New York: Augustus M. Kelley Publishers, 1928).
5. Jacob Viner, The Customs Union Issue (New York: Carnegie Endowment for International Peace, 1950).