2007). Directional evolution of virus within a host under immune selection. In Mathematics for Life Science and Medicine, cds. Y Takeuchi, Y Iwasa, K Sato. Springer: New York. 173. Lieberman E, JB Michel, J Jackson, T Tang, MA Nowak (2007). Quantifying the evolutionary dynamics of language. Nature 449

randt H, H Ohtsuki, Y Iwasa, K Sigmund (2007). A survey of indirect reciprocity. In Mathematics for Ecology and Evolution, eds. Y Takeuchi, Y Iwasa, K Sato. Berlin: Springer, 21-50. 161. Burnham TC (2007). High-testosterone men reject low ultimatum game offers. Proc R Soc B 274: 2327-2330. Page 7 of