G. R. Smith and J. A. . Lemos-Espinal, “Observations of Amplexus and Oviposition in Ollotis [Bufo] occidentalis in the Río Salado, Puebla, Mexico”, RandA, vol. 17, no. 1, pp. 46–47, Mar. 2010, doi: 10.17161/randa.v17i1.16066.