7Cooper, C.A. and Massell, B.F. , 1965, "Towards a General Theory of Customs Unions in Developing Countries",Journal of Political Economy, 73.
8Corden, W.M., 1972, "Economies of Scale and Customs Union Theory", Journal of Political Economy, 80,pp. 465-- 475.
9Deardorff, A., 1984,"Testing Trade Theories and Predicting Trade Flows", Handbook of International Economics,Vol. 1, North - Holland.
10Gu, Kejian,2000,"Impact of New Economy on Current International Trade: A Tentative Analysis on Time Spanning 1997- 98", 2000 Proceedings of Northeast Decision Science Institute, USA.