- ↑ Greene, Harry W (1983) Dietary correlates of the orgin and radiation of snakes, American Zoologist 23: 431-441
- ↑ Baird,S.F. and Girard,C. (1852) Characteristics of some new reptiles in the Museum of the Smithsonian Institution., Proc. Acad. Nat. Sci. Philadelphia 6: 68-70
- ↑ 3.0 3.1 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