Muizon, C. de; McDonald, H. G.; Salas, R.; Urbina, M. (junho de 2004). «The Youngest Species of the Aquatic Sloth Thalassocnus and a Reassessment of the Relationships of the Nothrothere Sloths (Mammalia: Xenarthra)». Society of Vertebrate Paleontology. Journal of Vertebrate Paleontology. 24 (2): 387–397. Bibcode:2004JVPal..24..387D. doi:10.1671/2429a
Akersten, W. A.; McDonald, H. G. (junho de 1991). «Nothrotheriops from the Pleistocene of Oklahoma and Paleogeography of the Genus». The Southwestern Naturalist. 36 (2): 178–185. JSTOR3671918. doi:10.2307/3671918
Fiedal, Stuart (2009). «Sudden Deaths: The Chronology of Terminal Pleistocene Megafaunal Extinction». In: Haynes, Gary. American Megafaunal Extinctions at the End of the Pleistocene. Col: Vertebrate Paleobiology and Paleoanthropology. [S.l.]: Springer. pp. 21–37. ISBN978-1-4020-8792-9. doi:10.1007/978-1-4020-8793-6_2
Muizon, C. de; McDonald, H. G.; Salas, R.; Urbina, M. (junho de 2004). «The Youngest Species of the Aquatic Sloth Thalassocnus and a Reassessment of the Relationships of the Nothrothere Sloths (Mammalia: Xenarthra)». Society of Vertebrate Paleontology. Journal of Vertebrate Paleontology. 24 (2): 387–397. Bibcode:2004JVPal..24..387D. doi:10.1671/2429a
Akersten, W. A.; McDonald, H. G. (junho de 1991). «Nothrotheriops from the Pleistocene of Oklahoma and Paleogeography of the Genus». The Southwestern Naturalist. 36 (2): 178–185. JSTOR3671918. doi:10.2307/3671918