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Baker, R. And Bellis, M. A. (1993a). Human sperm competition: ejaculate adjustment by males and the function of masturbation. Animal Behaviour, 46, 861-885.
Human Sperm Competition
Baker, R. And Bellis, M. A. (1993b). Human sperm competition: ejaculate manipulation by females and a function for the female orgasm. Animal Behaviour, 46, 887-909.
Human Sperm Competition
Sheldon, B. C. (1994). Sperm competition in the chaffinch: the role of the female. Animal Behaviour, 47, 163-173.
Human Sperm Competition
Olsson, M., Gullberg, A., and Tegelstroem, H. (1994). Sperm competition in the sand lizard, Lacerta agilis. Animal Behaviour, 48, 193-200.
Human Sperm Competition
Nagengast S.L., Baun M.M., Megal M. & Leibowitz J.M. (1997) The effects of the presence of a companion animal on physiological arousal and behavioural distress in children during a physical exam, Journal of Paediatric Nursing, 12(6), 323-330.
Pet Therapy
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