O. A. V. Marques and I. Sazima, “Ontogenetic color changes may strengthen suggestion about systematic affinities between two species of Chironius (Serpentes, Colubridae)”, Phyllomedusa, vol. 2, no. 1, pp. 65–67, Jun. 2003, doi: 10.11606/issn.2316-9079.v2i1p65-67.