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Citations
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Rubenstein Di,. (1981). Behavioural ecology of island feral horeses. Equine. Vet. J., 13, 27–34.
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SchäFer M,. (1981). Beobachtungen zum interspezifischen Aggressionsverhalten eines Halbeselhybrid. Säugetierk Mitt, 29, 49–58.
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TURNER JR JW et al,. (1981). Elimination marking behavior in feral horses. Can J Zool, 59, 1561–1566.
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Waage Jk,. (1981). How the zebra got its stripes – biting flies as selective agents in the evolution of zebra coloration. J ent Soc S Afr, 44, 351–358.
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Clutton-Brock, J. (1981). Domesticated animals from early times. Austin: Univ of Texas Press.
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Wittenberger, J. F. (1981). Animal Social Behavior. Boston: Duxbury Press.
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Bean, P. (1981). Punishment: A Philosophical and Criminological Enquiry.
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