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Valentinuzzi, M. E., E. del Valle Ruiz and C. P. da Costa.  1984.  Ventricular fibrillation threshold in the three-toed sloth (Bradypus tridactylus).  Acta Physiologica et Pharmacologica Latinoamericana, 34(3): 313-322.

Van Dijk, M. A. M., E. Paradis, F. Catzeflis, and W. W. De Jong.  1999.  The virtues of gaps: Xenarthran (Edentate) monophyly supported by a unique deletion in alpha A-Crystallin.  Systematic Biology, 48(1): 94.

Veselovsky, Z.  1966.  A contribution to the knowledge of the reproduction and growth of the two-toed sloth, Choloepus didactylus, at the Prague Zoo.  International Zoo Yearbook, 6: 147-153.

Vialou, A. V., . Aubry, M. Benabdelhadi, C. Cartelle, L. Figuti, M. Fontugne, M. E. Solari and D. Vialou.  1995.  Decouverte de Mylodontinae dans un habitat prehistorique date du Mato Grosso (Bresil); l'abri rupestre de Santa Elina.  Comptes Rendus de l'Academie des Sciences, Serie II. Sciences de la Terre et des Planetes, 320(7): 655-661.

Villafranca, I. F. and O. C. Castaneda.  1981.  Mamieros Sudamericanos en el Cenozoico tardio de Mexico y su significacion paleontologica.  Anais do Congresso Latino Americano Paleontologia, 2(2): 697-708.

Vizcaíno, S. F. and G. J. Scillato-Yané.  1995.  An Eocene tardigrade (Mammalia, Xenarthra) from Seymour Island, West Antarctica.  Antarctic Science, 7(4): 407-408.

Vizcaíno, S. F., M. Zárate, M. S. Bargo and A. Dondas.  2001.  Pleistocene burrows in the Mar del Plata area (Argentina) and their probable builders.  Acta Palaeontologica Polonica, 46(2): 289-301.

Vogel, I., B. de Thoisy and J. C. Vié.  1998.  A comparison of injectable anesthetic combinations in wild two-toed sloths (Choloepus didactylus).  Journal of Wildlife Diseases, 34: 555-566.

--------, J. C. Vié, B. Moreau and B. de Thoisy.  1999.  Hematological and serum chemistry profiles of free-ranging southern two-toed sloths in French Guiana.  Journal of Wildlife Diseases, 35: 531-535.

Volf, J.  1979.  Record longevity in the two-toed sloth, in Prague Zoo.  Ziva, 27(1): 33.


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