1. Trade liberalization among industrial countries;Balassa,1967
2. International trade and economic growth: An alternative to the neoclassical approach;Barker;Cambridge Journal of Economics,1977
3. Increasing returns and the theory of comparative advantage;Chacoliades;Southern Economic Journal,1970
4. The theory of monopolistic competition;Chamberlin,1962
5. Monopolistic competition and optimum product diversity;Dixit;American Economic Review,1977