R.R. Baker; M.A. Bellis (1993). "Human Sperm Competition: Ejaculation Manipulation by Females and a Function for the Female Orgasm". Animal Behavior. 46 (5): 887–909. doi:10.1006/anbe.1993.1272. S2CID53165064.
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R.R. Baker; M.A. Bellis (1993). "Human Sperm Competition: Ejaculation Manipulation by Females and a Function for the Female Orgasm". Animal Behavior. 46 (5): 887–909. doi:10.1006/anbe.1993.1272. S2CID53165064.