Gheerbrant, Emmanuel; Domning, Daryl P.; Tassy, Pascal (2005). «Paenungulata». I Rose, Kenneth D.; Archibald, J. David. The Rise of Placental Mammals: Origins and Relationships of the Major Extant Clades. JHU Press. ISBN9780801880223. OCLC55801049. Besøkt 29. august 2022.
worldcat.org
Reinhart, Roy Herbert (1959). «A review of the Sirenia and Desmostylia». University of California Publications in Geological Sciences. 36 (1): 1–146. OCLC3474601.
Gheerbrant, Emmanuel; Domning, Daryl P.; Tassy, Pascal (2005). «Paenungulata». I Rose, Kenneth D.; Archibald, J. David. The Rise of Placental Mammals: Origins and Relationships of the Major Extant Clades. JHU Press. ISBN9780801880223. OCLC55801049. Besøkt 29. august 2022.
