Serafim, H., D. M. Peccinini-Seale, and R. F. Batistic. “Karyotypic Studies of Two Brazilian Species of the Genus Micrurus (Ophidia: Elapidae)”. Biota Neotropica, vol. 7, no. 1, Jan. 2007, //www.biotaneotropica.org.br/BN/article/view/254.