L. Hautier, V. Weisbecker, MR. Sánchez-Villagra, A. Goswami i inni. Skeletal development in sloths and the evolution of mammalian vertebral patterning. „Proc Natl Acad Sci U S A”. 107 (44), s. 18903-8, 2010. DOI: 10.1073/pnas.1010335107. PMID: 20956304.
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L. Hautier, V. Weisbecker, MR. Sánchez-Villagra, A. Goswami i inni. Skeletal development in sloths and the evolution of mammalian vertebral patterning. „Proc Natl Acad Sci U S A”. 107 (44), s. 18903-8, 2010. DOI: 10.1073/pnas.1010335107. PMID: 20956304.