D. P. C. Peters, R. A. Pielke, B. T. Bestelmeyer, C. D. Allen, S. Munson-McGee, K. M. Havstad,
Cross-scale interactions, nonlinearities, and forecasting catastrophic events. Proceedings of the National Academy of Sciences of the United States of America. ,vol. 101, pp. 15130- 15135 ,(2004) ,
10.1073/PNAS.0403822101