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Pinkus, S., Smith, J., & Jolly, A. (2006). Feeding Competition Between Introduced Eulemur fulvus and Native Lemur catta During the Birth Season at Berenty Reserve, Southern Madagascar. In Ringtailed Lemur Biology (pp. 119–140).
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Hinde, R. A. (1983). A conceptural framework. In R. A. Hinde (Ed.), Primate Social Relationships (pp. 1–7). Massechusetts: Sinauer, Sunderland.
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Packer, C., & Pusey, A. E. (1985). Asymmetric contests in social mammals: respect, manipulation and age-specific aspects. In P. J. Greenwood, M. Slatkin, & (Ed.), Evolution: Essays in Honour of John Maynard Smith (pp. 173–86). Camebridge: Camebridge University Press.
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Pusey, A. E., & Packer, C. (2003). The Ecology of relationships. In J. R. Krebs, N. B. Davis, & (Ed.), Behavioural Ecology (pp. 254–283). Oxford: Blackwell Scientific Publication.
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Bannikov Ag,. (1966). Kulan (Equus hemionus Pallas) 1775. In N.P. Naumov V. G. Heptner (Ed.), Die Säugtiere der Sowjetunion (pp. 835–858). Jena.
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Blanc Ga,. Sulla esistenza di Equus (Asinus) hydruntinus regalia nel pleistocene del Nord Africa. (pp. 176–187).
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Bökönyi, S. (1984). Horse. In Manson (Ed.), Evolution of domesticated animals (Vol. 18, pp. 162–173). Hoboken, NJ: John Wiley & Sons.
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Bouman Jg,. (1979). A possible stallion exchange strategy in order to decrease inbreeding in the Przewalski horse. In L. E. M. de Boer, J. Bouman, & I. Bouman (Eds.), Genetics and Hereditary Diseases of the Przewalski horse (119). Rotterdam: er Foundation for the Preservation and Protection of the Przewalski Horse.
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Bouman Jg,. (1979). Breeding Przewalski horse in captivity. In L. E. M. de Boer, J. Bouman, & I. Bouman (Eds.), Genetics and Herdeditary Diseases of the Przewalski horse. Rotterdam: Foundation for the Preservation and Protection of the Przewalski Horse.
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Bouman Jg,. (1979). Does inbreeding ocur in free living horses? In L. E. M. de Boer, J. Bouman, & I. Bouman (Eds.), Genetics and Hereditary Diseases of the Przewalski horse (pp. 125–132). Rotterdam: Foundation for the Preservation and Protection of the Przewalski Horse.
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