N. R. de Albuquerque and R. W. McDiarmid, “ Redescription of Leptophis Cupreus (Cope) (Serpentes, Colubridae), a rare south American Colubrine Snake ”, Pap. Avulsos Zool., vol. 50, no. 23, pp. 375–384, Jan. 2010, doi: 10.1590/S0031-10492010002300001.