1. Tariff protection and increasing returns;Anderson,1936
2. Trade liberalization among industrial countries;Balassa,1967
3. International trade and economic growth: An alternative to the neoclassical approach;Barker;Cambridge Journal of Economics,1977
4. Some aspects of international trade under monopolistic competition;Beach,1936
5. Intra-industry trade in identical commodities;Brander;Journal of International Economics,1981