- ↑ Boulenger, G.A. (1889) Catalogue of the Chelonians, Rhynchocephalians, and Crocodiles in the British Museum (Natural History)., British Museum, London, 311 pp.
- ↑ Peters, W.C.H. (1848) Ueber eigenthümliche Moschusdrüsen bei Schildkröten., Müller’s Archiv für Anatomie und Physiologie 1848: 492-496
- ↑ 3.0 3.1 Smith, A. (1838) Illustrations of the Zoology of South Africa, consisting chiefly of Figures and Descriptions of the Objects of Natural History collected during an Expedition into the Interior of South Africa, in the years 1834, 1835, and 1836 . . . Vol. 3, Reptilia. 28 p, Smith, Elder, & Co., London [This series was published in 28 parts; see Waterhouse 1880, Proc. Zool. Soc. London, 1880:489-491, and Jentink 1893, Notes Leyden Mus. 15:182, for publication dates and contents.]
- ↑ 4.0 4.1 Bisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (ed.) (2011). "Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist". Species 2000: Reading, UK. Ginkuhà 24 Septyembre 2012.CS1 maint: multiple names: authors list (link) CS1 maint: extra text: authors list (link)
- ↑ TIGR Reptile Database . Uetz P. , 2 Oktubre 2007