Yang, Jian-Huan, Ying-Yong Wang, Bing Zhang, Michael Wai-Neng Lau, and Wen-Hao Chou. 2011. “Revision of the Diagnostic Characters of Opisthotropis Maculosa Stuart and Chuaynkern, 2007 With Notes on Its Distribution and Variation, and a Key to the Genus Opisthotropis (Squamata: Natricidae)”. Zootaxa 2785 (1). Auckland, New Zealand:61–68. https://doi.org/10.11646/zootaxa.2785.1.4.