Torres-Carvajal, Omar, et al. “Morphology and Distribution of the South American Snake Chironius Leucometapus (Serpentes: Colubridae)”. Phyllomedusa: Journal of Herpetology, vol. 18, no. 2, Dec. 2019, pp. 241-54, https://doi.org/10.11606/issn.2316-9079.v18i2p241-254.