Goerg, Sebastian J. Max Planck Institute for Research on Collective Goods, Max Planck Society;
http://www.pnas.org/content/early/2013/05/31/1308221110 (Any fulltext)
Fischer, I., Frid, A., Goerg, S. J., Levin, S. A., Rubenstein, D. I., & Selten, R. (2013). Fusing enacted and expected mimicry generates a winning strategy that promotes the evolution of cooperation. Proceedings of the National Academy of Sciences (PNAS), 110, 10229-10233.