Heyer, W. R.; Mello, C. C. Descriptions of the Advertising Calls of Cycloramphus Asper and Cycloramphus Dubius (Amphibia: Leptodactylidae). Pap. Avulsos Zool. 1979, 32 (1-23 (1978-1979), 193-200. https://doi.org/10.11606/0031-1049.1979.32.p193-200.