L. Smith
Carpenter, Stephen R., Jonathan J. Cole, Michael L. Pace, Ryan D. Batt, William A. Brock, Timothy J. Cline, J.J. Coloso, et al. 2011. “Early Warnings of Regime Shifts: A Whole-Ecosystem Experiment”. Science 332: 1079-82. doi:10.1126/science 1203672.