1. A Neo-Darwinian Theory of Beneficent Norms;Allison,1991
2. Dual inheritance theory and human kin behavior;Boyd,1978
3. Culture and The Evolutionary Process;Boyd,1985
4. Cultural Transmission and Evolution: A Quantitative Approach;Cavalli-Sforza,1981
5. The genetical evolution of social behaviour. I, II;Hamilton;Journal of Theoretical Biology,1964