1. Evolution of Cooperation;R Axelrod;Science,1981
2. Dawkins R (1989) The Selfish Gene. Oxford: Oxford Univ. Press.
3. The Nature of Human Altruism;E Fehr;Nature,2003
4. Boyd R, Richerson PJ (1985) Culture and the Evolutionary Process Chicago: University of Chicago Press.
5. Gene-culture coevolution in the age of genomics;PJ Richerson;Proc Natl Acad Sci U S A,2010