^[1] Darwin, C., The Descent of Man and Selection in Relation to Sex, Modem Library, Nueva York, 1871, pág. 918 trad. esp.: El origen del hombre, M.E. Editores, Madrid, 1994].<<

^[2] Small, M.F., Female Choices: Sexual Behavior of Female Primates, Cornell University Press, Ithaca, N.Y., 1993, págs. 10-11.<<