D. Geraads m.fl. (2021). «New remains of Camelus grattardi (Mammalia, Camelidae) from the Plio-Pleistocene of Ethiopia and the phylogeny of the genus». Journal of Mammalian Evolution. 28: 359–370. ISSN1064-7554. doi:10.1007/s10914-019-09489-2.
D. Geraads m.fl. (2021). «New remains of Camelus grattardi (Mammalia, Camelidae) from the Plio-Pleistocene of Ethiopia and the phylogeny of the genus». Journal of Mammalian Evolution. 28: 359–370. ISSN1064-7554. doi:10.1007/s10914-019-09489-2.