1. Chambers, Paul E.; Kohn, Robert E. “Environmental Barriers to Trade: The Case of Endangered Sea Turtles,”Review of International Economics, 9, 1, February 2001, pp. 123–132.
2. Farley, Joshua, “Should Market Economists be Protesting the WTO Too?”Ecological Economics, 33, 2000, pp. 337–340.
3. Fredriksson, Per G. “The Political Economy of Trade Liberalization and Environmental Policy,”Southern Economic Journal, 65, 1999, 513–525.
4. Friedman, Thomas L.The Lexus and the Olive Tree, Anchor Books, New York, 2000.
5. Jaffe, Adam B.; Peterson, Steven R.; Portney, Paul R.; Stavins, Robert N. “Environmental Regulation and the Competitiveness of U.S. Manufacturing: What Does the Evidence Tell Us?”Journal of Economic Literature, 33, March 1995, pp. 132–163.