Gaudin, Timothy J. (1. 2. 2004). „Phylogenetic relationships among sloths (Mammalia, Xenarthra, Tardigrada): the craniodental evidence”. Zoological Journal of the Linnean Society. 140 (2): 255—305. ISSN0024-4082. S2CID38722942. doi:10.1111/j.1096-3642.2003.00100.x.
Muizon, C. de; McDonald, H. G.; Salas, R.; Urbina, M. (јун 2004). „The evolution of feeding adaptations of the aquatic sloth Thalassocnus”. Journal of Vertebrate Paleontology. 24 (2): 398—410. Bibcode:2004JVPal..24..398D. JSTOR4524727. S2CID83859607. doi:10.1671/2429b.
Narita, Yuichi; Kuratani, Shigeru (15. 3. 2005). „Evolution of the vertebral formulae in mammals: A perspective on developmental constraints”. Journal of Experimental Zoology Part B: Molecular and Developmental Evolution (на језику: енглески). 304B (2): 91—106. ISSN1552-5015. PMID15660398. doi:10.1002/jez.b.21029.
Muizon, C. de; McDonald, H. G.; Salas, R.; Urbina, M. (јун 2004). „The evolution of feeding adaptations of the aquatic sloth Thalassocnus”. Journal of Vertebrate Paleontology. 24 (2): 398—410. Bibcode:2004JVPal..24..398D. JSTOR4524727. S2CID83859607. doi:10.1671/2429b.
Muizon, C. de; McDonald, H. G.; Salas, R.; Urbina, M. (јун 2004). „The evolution of feeding adaptations of the aquatic sloth Thalassocnus”. Journal of Vertebrate Paleontology. 24 (2): 398—410. Bibcode:2004JVPal..24..398D. JSTOR4524727. S2CID83859607. doi:10.1671/2429b.
Narita, Yuichi; Kuratani, Shigeru (15. 3. 2005). „Evolution of the vertebral formulae in mammals: A perspective on developmental constraints”. Journal of Experimental Zoology Part B: Molecular and Developmental Evolution (на језику: енглески). 304B (2): 91—106. ISSN1552-5015. PMID15660398. doi:10.1002/jez.b.21029.
Gaudin, Timothy J. (1. 2. 2004). „Phylogenetic relationships among sloths (Mammalia, Xenarthra, Tardigrada): the craniodental evidence”. Zoological Journal of the Linnean Society. 140 (2): 255—305. ISSN0024-4082. S2CID38722942. doi:10.1111/j.1096-3642.2003.00100.x.
Muizon, C. de; McDonald, H. G.; Salas, R.; Urbina, M. (јун 2004). „The evolution of feeding adaptations of the aquatic sloth Thalassocnus”. Journal of Vertebrate Paleontology. 24 (2): 398—410. Bibcode:2004JVPal..24..398D. JSTOR4524727. S2CID83859607. doi:10.1671/2429b.
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„Overview”. The Sloth Conservation Foundation. Приступљено 29. 11. 2017.
Gaudin, Timothy J. (1. 2. 2004). „Phylogenetic relationships among sloths (Mammalia, Xenarthra, Tardigrada): the craniodental evidence”. Zoological Journal of the Linnean Society. 140 (2): 255—305. ISSN0024-4082. S2CID38722942. doi:10.1111/j.1096-3642.2003.00100.x.
Narita, Yuichi; Kuratani, Shigeru (15. 3. 2005). „Evolution of the vertebral formulae in mammals: A perspective on developmental constraints”. Journal of Experimental Zoology Part B: Molecular and Developmental Evolution (на језику: енглески). 304B (2): 91—106. ISSN1552-5015. PMID15660398. doi:10.1002/jez.b.21029.