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Zehnder, A. M., Ramer, J. C., & Proudfoot, J. S. (2006). The use of altrenogest to control aggression in a male Grant's Zebra (Equus burchelli boehmi). J Zoo Wildl Med, 37(1), 61–63.
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Boyd, L. (1986). Behavior problems of equids in zoos. Vet Clin North Am Equine Pract, 2(3), 653–664.
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Kendal, R. L., Coe, R. L., & Laland, K. N. (2005). Age differences in neophilia, exploration, and innovation in family groups of callitrichid monkeys. Am. J. Primatol., 66(2), 167–188.
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Palagi, E., Paoli, T., & Tarli, S. B. (2004). Reconciliation and consolation in captive bonobos (Pan paniscus). Am. J. Primatol., 62(1), 15–30.
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Bonnie, K. E., & de Waal, F. B. M. (2006). Affiliation promotes the transmission of a social custom: handclasp grooming among captive chimpanzees. Primates, 47(1), 27–34.
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Liebal, K., Pika, S., & Tomasello, M. (2004). Social communication in siamangs (Symphalangus syndactylus): use of gestures and facial expressions. Primates, 45(1), 41–57.
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Gruter, C. C. (2004). Conflict and postconflict behaviour in captive black-and-white snub-nosed monkeys (Rhinopithecus bieti). Primates, 45(3), 197–200.
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Walker, M. L., & Becklund, W. W. (1971). Occurrence of a cattle eyeworm, Thelazia gulosa (Nematoda: Thelaziidae), in an imported giraffe in California and T. lacrymalis in a native horse in Maryland. J Parasitol, 57(6), 1362–1363.
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Dierenfeld, E. S. (1994). Vitamin E in exotics: effects, evaluation and ecology. J Nutr, 124(12 Suppl), 2579s–2581s.
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Blunden, A. S., Smith, K. C., Whitwell, K. E., & Dunn, K. A. (1998). Systemic infection by equid herpesvirus-1 in a Grevy's zebra stallion (Equus grevyi) with particular reference to genital pathology. J Comp Pathol, 119(4), 485–493.
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