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J. C. Mantilla Castaño, S. Escobar-Lasso, y J. A. Rojas-Morales, «First record of the Colombian endemic plump toad Osornophryne percrassa Ruiz-Carranza and Hernández-Camacho, 1976 (Anura: Bufonidae) from the Department of Risaralda, Central Mountain Range of Colombia», Rev. Biodivers. Neotrop., vol. 8, n.º 1, pp. 49–54, may 2018.