Ashley، M.V.؛ Norman، J.E.؛ Stross، L. (1996). "Phylogenetic analysis of the perissodactyl family tapiridae using mitochondrial cytochrome c oxidase (COII) sequences". Journal of Mammalian Evolution. ج. 3 ع. 4: 315–326. DOI:10.1007/BF02077448. S2CID:24948320.
Ashley، M.V.؛ Norman، J.E.؛ Stross، L. (1996). "Phylogenetic analysis of the perissodactyl family tapiridae using mitochondrial cytochrome c oxidase (COII) sequences". Journal of Mammalian Evolution. ج. 3 ع. 4: 315–326. DOI:10.1007/BF02077448. S2CID:24948320.