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Citations
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Schwarz E,. (). Beiträge zur Kenntnis der Zebras. Archiv Naturgesch, 78 Abt A, 34–57.
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Schwarz E,. (1929). Ein südpersischer Wildesel im Berliner Zoologischen Garten. Zool. Garten., 2, 85–94.
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Sclater,. (1901). Notice of a Zebra taken from Ludophus's work Abyssinia. Proc Zool Soc Lond, 2(1), 2.
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Sereni J.L, B. M. (1978). Mise en évidence des relations de dominance – subordination chez le cheval, par la méthode de compétition alimentaire par paire. Biol Behav, 3, 87–93.
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Shaki Sp,. (1983). About the indian Wild ass. Tigerpaper, 10, 13–16.
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Short Rv,. (1975). The evolution of the horse. J Reprod Fert Suppl, 23, 1–6.
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Shortridge Gc,. (1934). The mammals of South West Africa. Heinemann (London), , 389–412.
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Shotwell Ja,. (1961). Late tertiary biogeography of horses in the Northern Great Basin. J Paleont, 35, 203–217.
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Sidney J,. (1965). The past and present distribution of african ungulates. Transactions Zool Soc Lond, 30.
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Simpson Gg,. (1951). Horses.
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