1. The evolution of social behavior;Alexander;Annual Review of Ecology and Systematics,1974
2. Alexander, R., 1987. The Biology of Moral Systems. Aldine De Gruyter, New York.
3. A condition for group selection to prevail over counteracting individual selection;Aoki;Evolution,1982
4. The archaeology of complex hunter-gatherers;Arnold;Journal of Archaeological Method and Theory,1996
5. Asch, S.E., 1951. Effects of group pressure upon the modification and distortion of judgments. In: Guetzkow, H. (Ed.), Groups, Leadership and Men. Carnegie, Pittsburgh, pp. 177–190.