1. Ashley, M. 1963 Love and Marriage in the Sixteenth and Seventeenth Centuries . In The Stuarts in Love, with Some Reflections on Love and Marriage in the Sixteenth and Seventeenth Centuries. M. Ashley, ed. pp. 9-62. London: Hodder and Stoughton.
2. Chagnon, N., and P. Bugos 1979 Kin Selection and Conflict: An Analysis of a Yanomamo Ax Fight In Evolutionary Biology and Human Social Behavior: An Anthropological Perspective. N. Chagnon and W. Irons, eds. pp. 213-237. Belmont, Calif.: Wadsworth.