Zaracho, V. H., L. D. Aguiar, and A. A. Giaretta. “Geographic Variation in the Advertisement Call of Trachycephalus typhonius Anura: Hylidae) Based on South American Samples”. Zootaxa, vol. 4521, no. 3, Nov. 2018, pp. 404–416, doi:10.11646/zootaxa.4521.3.6.