References
Bernor, R. L. and Hussain, S.T., 1985 - An assessment of the systematic, phylogentic and biogeogeraphy relationshipe of Siwalik hipparion horse. Journal of Vertebrate Paleontology, v.5(1), p. 32-87.
Bernor, R.L. and Armour-chelu, M., 1999 - Toward and evolutionary history of African hipparion horse, in T. Brommage, and F. schreenky, eds., African biogeogeraphy, climalete change and early hominid evoloution: oxford, Unversity Press, pp: 186-215.
Bernor, R.L., Tobien, H., Woodburne, M.O., 1990- PATTERNS OF OLD WORLD HIPPARIONINE EVOLUTIONARY DIVERSIFICATION AND BIOGEOGERAFYC EXTEVSION. Euroupean Neogene Mammal Chronolog.
Bernor, R.L.et Tobien, H.,1989- Two small species of Cremohipparion (Equidae, Mammalia) from Samos, REVISION SYSTEMATIQUE DES HIPPARION SENSULATO 95Greece. Mitteilungen der Bayerischen Staatssammlung fur Palaontologie und historische Geologie, 29:207-226.
Eisenmann, V., Alberdi, M.T., Giuli, C. de, and Staesche, U., 1988- Vol. I: Methodology. In M.O. Woodburne and P.Y. Sondaar (editors), Studying fossil horses: 1–71. Leiden: E.J. Brill.
Koufos, G.D., Melentis, E.T., 1984- The Late Miocene (Turolian) mammalian fauna of Samos island (Gressce). Study of the collection of palaeontogical Museum of Mytilinii, Sameos. 1. Carnivora. – Science Annals of the Fac Physics Mathematics, University of Thessaloniki, 22:175-193.
Macfadden, B.J., 1984- Systematics and phylogeny of hipparion, Neohipparion, Nannippus, and Cormohipparion (Mammalia, Equodae) from the Miocene and Pliocene of the New World. Bulletin of the American Museum of Natural History 179(1): 1-195.
Osborn, H.F., 1907- Evolution of mammalian molar teeth. New York: Macmillan, 250 pp.
Osborn, H.F., 1918- Equidae of the Oligocene, Miocene, and Pliocene of North America, iconographic type revision. Memoris of the American.
Stirton, R.A., 1941- Development of characters in horse teeth and the dental nomenclature. Journal of Mammalogy 22:434-446.
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