Werman, S. D.; Crother, B. I.; White, M. E. PHYLOGENY OF SOME MIDDLE AMERICAN PITVIPERS BASED ON A CLADISTIC ANALYSIS OF MITOCHONDRIAL 12S AND 16S DNA SEQUENCE INFORMATION. ch 1999, No. 1, 1-13. https://doi.org/10.17161/ch.vi1.11949.