Zaher, Hussam, Felipe Gobbi Grazziotin, John E. Cadle, Robert W. Murphy, Julio Cesar de Moura-Leite, and Sandro L. Bonatto. 2009. “ Molecular Phylogeny of Advanced Snakes (Serpentes, Caenophidia) With an Emphasis on South American Xenodontines: A Revised Classification and Descriptions of New Taxa ”. Papéis Avulsos De Zoologia 49 (11): 115-53. https://doi.org/10.1590/S0031-10492009001100001.