1Norris R H, Thoms M C. What is the river health [J]. Fresh-water Biology, 1999, 41(1) : 197 -209.
2Haskell B D, Norton B G, Costamza R. What is ecosystem health and why should we worry about it [ M] //Contanza R, Norton B G, Haskell B D. Ecosystem Health : New Goals for Environmental Management. Washington D C: Island Press, 1992.
3Ulanowicz R E. Ecosystem heahh and tropic flow networks [M] //Costanza R, Northon B G, Haskell B D. Ecosystem Health: New Goals for Environmental Management . Washington D C: Island Press, 1992.
4Mageau M T, Costanza R, Ulanowicz R E. The development and initial testing of a quantities assessment of ecosystem health [J]. Ecosystem Health, 1995, 1(4): 15-26.
5Constanza R. Toward an operational definition of ecosystem health [M] //Constanza R, Benjamin D H. Ecosystem Health: New Goals for Environmental Management. Washington D C: Island Press, 1992.
6Rapport D J. Ecosystem Health [ M ]. Oxford: Blackwell Science, 1998.
7Xu F L. Ecosystem health assessment for lake Chao, a shallow eutrophic Chinese lake [ J]. Lakes & Reservoirs: Research & Management, 1996, 2(2) : 125 - 130.
8Xu F L. Exergy and structural exergy as ecological indicators for the development state of the Lake Chaohu ecosystem [ J]. Ecosystem Modeling, 1997, 99(1) : 59 -65.
9Xu F L, Jorgensen S E, Tao S. Ecological indicators for assessing fresh water ecosystem health [ J ]. Ecological Modeling, 1999, 116(1): 120-128.