Barrio-Amorós, César L., Josefa Celsa Señaris, Ross D. Macculloch, Amy Lathrop, Juan M. Guayasamin, and William E. Duellman. 2011. “ Distribution, Vocalization and Taxonomic Status of Hypsiboas Roraima and H. Angelicus (Amphibia: Anura: Hylidae) ”. Papéis Avulsos De Zoologia 51 (2): 21-28. https://doi.org/10.1590/S0031-10492011000200001.