2Barrett S. Strategic environmental policy and international trade[J]. Journal of Public Economics, 1994, (54):325-338.
3Brander J, Spencer B. Export subsidies and market share rivalry[J]. Journal of International Economics, 1985,(18):83-100.
4Das S, Donnenfeld S. Oligopolistic competition and international trade: quantity and quality restrictiom[J]. Journal of International Economics, 1989, (27) :299-318.
5Boom A. Asymmetric international minimum quality standards and vertical differentiation [ J ]. The Journal of Industrial Economics, 1995,18(XLIII) : 101-120.
6Griffin J.Customer Loyalty. How to Earn It, How to Keep It, Yew York. Simmon & Schuster Inc.
