8Antweiler, Copeland B. and S.Taylor, (1998) "Is Free Trade Good for the Environment?" Discussion Paper No. 98-11, Department of E-conomics, University of Brithish Columbia, Canada.
9Cole, A.J. Rayner and J.M. Bates, (1998) “Trade Liberalization and Environment: The Case of the Uruguay Round,” World Economic 21 (3).
10Copeland, B. and S. Taylor, (1994) "North-South Trade and the Environment," Quarterly Jounal of Economic 8.