4Fiorentino,Roberto V.,Luis Verdeja and Christelle Toqueboeuf,The Changing Landscape of Regional Trade Agreements:2006 Update,World Trade Organization Discussion Paper No.12,2006.
5Bhagwati,Jagdish and Arvind Panagariya,Preferential Trading Areas and Multilateralism,Trading Blocs,MIT press.1999.
6Limao,Nuno,"Are Preferential Trade Agreements with Non-Trade Objectives a Stumbling Block for Multilateral Liberalization?",Review of Economic Studies,2007,74.
7Levy,Philip I.,"A Political Economic Analysis of Free-Trade Agreements",American Economic Review,1997,87.
8Krishna,Pravin,"Regionalism and Multilateralism:A Political Economy Approach",Quarterly Journal of Economics,1998,113.
9Baldwin,Richard E.,A Domino Theory of Regionalism,Cambridge University Press,1995.
10Baldwin,Richard E.,Stepping Stones or Building Blocs?Regional and Multilateral integration,European Central Bank,2005.
