Title: Catastrophic Shifts in Ecosystems.

Authors: Scheffer, M., S. Carpenter, J. A. Foley, C. Folke, and B. Walker.

Citation: Scheffer, M., S. Carpenter, J. A. Foley, C. Folke, and B. Walker. 2001. Catastrophic Shifts in Ecosystems. Nature 413, no. 6856: 591-96.