Barrio-Amorós, C.L. et al. 2011. Distribution, vocalization and taxonomic status of hypsiboas roraima and h. angelicus (Amphibia: Anura: Hylidae) . Papéis Avulsos de Zoologia. 51, 2 (Jan. 2011), 21–28. DOI:https://doi.org/10.1590/S0031-10492011000200001.