1. Anwar, S. (1999): “Protection, International Factor Mobility and Monopolistic Competition.” Mimeo.
2. Bhagwati, J., Panagariya, A., and Srinivasan, T. (1998):Lectures on International Trade, 2nd ed. Cambridge, Mass.: MIT Press.
3. Ethier, W. (1979): “Internationally Decreasing Costs and World Trade.”Journal of International Economics 9: 1–24.
4. Ethier, W. (1982): “National and International Returns to Scale in the Modern Theory of International Trade.”American Economic Review 72: 950–959.
5. Faini, R. (1984): “Increasing Returns, Non-Traded Inputs and Regional Development.”Economic Journal 94: 308–323.