1. Benassy, J. P.: Monopolistic competition. In: Hildenbrand, W., Sonnenschein, H. (eds.)Handbook of mathematical economics, Vol. IV, pp. 1997?2045. Amsterdam: North-Holland (1991)
2. Bonanno, G.: General equilibrium theory with imperfect competition.J. Econ. Surv. 4, 297?328 (1990)
3. Brander, J.: Intra-industry trade in identical commodities.J. Int. Econ. 11, 1?14 (1981)
4. Brooke, A., Kendrick, D., Meeraus, A.:GAMS: A user's guide. San Francisco: Scientific Press (1988)
5. Brown, D. K., Stern, R. M.: U. S.-Canada bilateral tariff elimination: The role of product differentiation and market structure. In: Feenstra, R. C. (ed.)Trade policies for international competitiveness. pp. 217?245 Chicago: University of Chicago Press (1989)