6187-6191. 246. Rune C, T Pfeiffer (2009). Evolution of reciprocal altruism by copying of observed behavior. Current Science 97: 1573-1578. 247. Tarnita CE, T Antal, MA Nowak (2009). Mutation-selection equilibrium in games with mixed strategies. J theor Biol 261: 50-57. 248. Tarnita CE, T Antal, H Ohts