1. Anderson, C. 2002. Self-Organization in Relation to Several Similar Concepts: Are the Boundaries to Self-Organization Indistinct? Biological Bulletin 202.3: 247–255.
2. Boyd, R. and Richerson, P. J. 1985. Culture and the Evolutionary Process. Chicago: University of Chicago Press.
3. Darwin, C. R. 1859. On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life. Cambridge, MA: Harvard University Press.
4. Darwin, C. R. 1871. The Descent of Man, and Selection in Relation to Sex, 2 vols. London: Murray and New York: Hill.
5. Dawkins, R. 1983. Universal Darwinism. In Bendall, D. S. (Ed.) 1983. Evolution from Molecules to Man. Cambridge: Cambridge University Press: 403–425.