^Cope, E.D. (1885) A contribution to the herpetology of Mexico., Proc. Amer. Philos. Soc. 22: 379-404
^Garman,Samuel (1884) The reptiles and batrachians of North America., Mem. Mus. comp. Zool, Cambridge (Massachusetts), 8 (3): xxxiv + 185 pp. [1883] [CNAH reprint 10]
^Cope, E.D. (1868) An examination of the Reptilia and Batrachia obtained by the Orton Expedition to Equador and the Upper Amazon, with notes on other species., Proc. Acad. Nat. Sci. Philadelphia 20: 96-140
^ abJan, G. (1862) Enumerazione sistematico delle specie d'ofidi del gruppo Calamaridae., Arch. Zool., Anat. Fisiol., 2: 1-76.
^ abBisby F.A., Roskov Y.R., Orrell T.M., Nicolson D., Paglinawan L.E., Bailly N., Kirk P.M., Bourgoin T., Baillargeon G., Ouvrard D. (red.) (). „Species 2000 & ITIS Catalogue of Life: 2011 Annual Checklist”. Species 2000: Reading, UK. Accesat în .Mentenanță CS1: Nume multiple: lista autorilor (link)