1. Allen, C. R., Gunderson, L., & Johnson, A. R. (2005). The use of discontinuities and functional groups to assess relative resilience in complex systems. Ecosystems, 8, 958–966.
2. Anderson, D. G. (1996). Fluctuations between simple and complex chiefdoms: cycling in the late prehistoric southeast. In J. F. Scarry (Ed.), Political structure and change in the southeastern United States (pp. 231–252). Gainesville: University Press of Florida.
3. Arnold, J. E. (1996). Emergent complexity: the evolution of intermediate societies. Ann Arbor, Michigan: International Monographs in Prehistory.
4. Axtell, R. L., Epstein, J. M., Dean, J. S., Gumerman, G. J., Swedlund, A. C., Harburger, J., Chakravarty, S., Hammond, R., Parker, J., & Parker, M. (2002). Population growth and collapse in a multiagent model of the Kayenta Anasazi in Long House Valley. Proceedings of the U. S. National Academy of Sciences, 99(10) suppl. 3, 7275–7279.
5. Bak, P. (1996). How nature works: the science of self-organized criticality. New York: Copernicus Books.