7van Beers, C., and van den Bergh, J. An Empirical Multi-Country Analysis of the Impact of Environmental Regulations on Foreign Trade Flows [J]. Kyklos, 1997(50): 29-46.
8Xu, Xinpeng, International Trade and Environmental Regulation: Time Series Evidence and Cross Section Test [J]. Environmental and Resource Economics 20(30(17) : 233 - 257.
9van Beers, C., and van den Bergh, J. The Impact of Environmental Policy on Foreign Trade: Tobey Revisited with a Bilateral Trade Flow, The Tinbergen Institute Discussion Paper [W]. TI2000- 069/3.
10Otsuki, T., Wilsont, J.S., Sewadeh, M, "A Race to the Top? A Case Study of Food Safety Standards and African Exports". World Bank POLICY RESEARCH WORKING PAPER 2563, March 2001.