L. B. Martins, A. A. Giaretta, T. R. Carvalho, and R. Y. Miwa, “Vocalizations of Hypsiboas beckeri and H. stenocephalus (Anura: Hylidae), two species of the H. polytaenius group from southeastern Brazil”, Phyllomedusa, vol. 15, no. 1, pp. 51–64, Jul. 2016, doi: 10.11606/issn.2316-9079.v15i1p51-64.