1. Aristoteles, Politics (1944),
http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.01.0058:book=1:section=1253a
. Zugegriffen: 25. März 2015
2. Aristoteles, Politik II, Werke Bd. 9/II. Darmstadt (1991b)
3. S.E. Asch, in Groups, Leadership and Men; Research in Human Relations, Hrsg. H. Guetzkow. Effects of group pressure upon the modification and distortion of judgments (Carnegie Press, Oxford, 1951), S. 177–190
4. R. Axelrod, Die Evolution der Kooperation (Basic Books, München, 1987)
5. Batson, C. D., & Shaw, L. L. (1991). Evidence for altruism: Toward a pluralism of prosocial motives. Psychological Inquiry, 2, S. 107–122