Pocock, Reginald Innes, 1902, A new arrangement of the existing species of Equidæ, with the description of a new subspecies of " Zebra. "

Pocock, Reginald Innes, 1902, A new arrangement of the existing species of Equidæ, with the description of a new subspecies of " Zebra. ", Annals and Magazine of Natural History, Including Zoology, Botany and Geology, Being a Continuation of the ' Magazine of Botany and Zoology', and of Louden and Charlesworth's ' Magazine of Natural History', Series 7 10, pp. 304-308