P. H. D. S. Dias, A. M. P. T. de Carvalho-E-Silva, and S. P. de Carvalho-E-Silva, “Larval chondrocranium morphology of five species of Proceratophrys Miranda-Ribeiro (Amphibia; Anura; Odontophrynidae)”, Zootaxa, vol. 3683, no. 4, pp. 427–438, Jul. 2013.