1. SR Carpenter, D. Ludwig, and WA Brock .1999 .Management of eutrophication for lakes subject to potentially irreversible change .Ecol Appl,9:751 -71 .
2. CL Dent, GS Cumming, and SR Carpenter .2002 .Multiple states in river and lake ecosystems .Philos T Roy Soc B,357:635 -45 .
3. JA Drake .1991 .Community-assembly mechanics and the structure of an experimental species ensemble .Am Nat,137:1 -26 .
4. HT Dublin, ARE Sinclair, and J. McGlade .1990 .Elephants and fire as causes of multiple stable states in the Serengeti-Mara woodlands .J Anim Ecol,59:1147 -64 .
5. C. Holling, 1973 .Resilience and stability of ecological systems .Annu Rev Ecol Syst,4:1 -24 .