Albuquerque, Nelson R. de, and Roy W. McDiarmid. “ Redescription of Leptophis Cupreus (Cope) (Serpentes, Colubridae), a Rare South American Colubrine Snake ”. Papéis Avulsos De Zoologia, vol. 50, no. 23, Jan. 2010, pp. 375-84, https://doi.org/10.1590/S0031-10492010002300001.