1. J.H. Crook and J.S. Gartlan, Nature, 210, 1200, 1966.
2. J.F. Eisenberg, N.A. Muckenhírn and R. Rudran, Science, 175, 863, 1972.
3. K. Kawanaka, Primates, 14, 113, 1973.
4. I.S. Bernstein, T.P. Gordon and R.M. Rose, Factors influencing the expression of aggression during introductions to Rhesus Monkey Groups, In: Primate aggression, territoriality, and xenophobia, ed. by R.L. Holloway, Academic Press, New York, 1974.
5. J. Boggess, Folia Primatol., 32, 65, 1979.