Mer om homoseksualitet hos dyr

Bagemihl, B. 1999. Biological Exuberance: Animal Homosexuality and Natural Diversity. St. Martin's Press. 752 pp.

de Waal, F. 1997. Bonobo: The Forgotten Ape. University of California Press, Berkeley.

de Waal, F. M. B. & R. Ren (1988): Peacemaking among Primates. Harvard University Press, Cambridge (Massachusetts).

Roughgarden, J. 2004. Evolution's Rainbow: Diversity, Gender, and Sexuality in Nature and People. University of California Press. Berkeley CA. 474 pp

Sommer, V & P. L Vasey (2006): Homosexual Behaviour in Animals, An Evolutionary Perspective. Cambridge University Press, Cambridge.