Shoshani, Jeheskel (). „A proboscidean from the late Oligocene of Eritrea, a "missing link" between early Elephantiformes and Elephantimorpha, and biogeographic implications”. PNAS. 103 (46). doi:10.1073/pnas.0603689103.|access-date= necesită |url= (ajutor)
Don E. Wilson; DeeAnn Reeder, „Class Mammalia Linnaeus, 1758”(PDF), Animal Biodiversity: An Outline of Higher-level Classification and Survey of Taxonomic Richness, pp. 56–60, WikidataQ19302303
Andrew T. Smith; Yan Xie; Darrin P. Lunde; Don E. Wilson; W. Christopher Wozencraft; Robert S. Hoffmann; Wang Sung; John R. MacKinnon (), Andrew T. Smith; Yan Xie, ed., A Guide to the Mammals of China. (în engleză), Ilustrator: Federico Gemma, Princeton: Princeton University Press, p. 155, OL18549022W, WikidataQ19604469
Don E. Wilson; DeeAnn Reeder, „Class Mammalia Linnaeus, 1758”(PDF), Animal Biodiversity: An Outline of Higher-level Classification and Survey of Taxonomic Richness, pp. 56–60, WikidataQ19302303
Andrew T. Smith; Yan Xie; Darrin P. Lunde; Don E. Wilson; W. Christopher Wozencraft; Robert S. Hoffmann; Wang Sung; John R. MacKinnon (), Andrew T. Smith; Yan Xie, ed., A Guide to the Mammals of China. (în engleză), Ilustrator: Federico Gemma, Princeton: Princeton University Press, p. 155, OL18549022W, WikidataQ19604469