Welton, L. J., S. L. Travers, C. D. Siler, and R. M. Brown. “Integrative Taxonomy and Phylogeny-Based Species Delimitation of Philippine Water Monitor Lizards (Varanus salvator Complex) With Descriptions of Two New Cryptic Species”. Zootaxa, vol. 3881, no. 3, Nov. 2014, pp. 201–227, doi:10.11646/zootaxa.3881.3.1.