1. BOURNE L S, SIMMONS J W, 1978. Systems of Cities [M]. New York: Oxford University Press.
2. BRAAT L, VAN LIEROP W, 1986. Economic-ecological modeling: an introduction to methods and applications [J]. Ecological Modelling, 31: 33–44.
3. BRENNA E M, 1999. Population, urbanization, environment, and security: a summary of the issues [J]. Environmental Change & Security Project Report, 5: 4–23.
4. COMMONER B, CORR M, STAMLER P J, 1971. The causes of pollution [J]. Environment, 13(3), 2–19.
5. FANG Chuang-lin, YU Dan-lin, 1999. Study on optimal-control experiment of the resources development and corresponding development between economy and eco-environment in the Qiadam basin [J]. Acta Ecologica Sinica, 19(6): 767–774. (in Chinese)