• [Wiki] http://en.wikipedia.org/wiki/Ceratophrys_cranwelli.
• [amphibiaweb] https://amphibiaweb.org/cgi/amphib_query?where-genus=Ceratophrys&where-species=cranwelli.
• [EoL] https://eol.org/pages/337390.
• [GrayCook2005] Grayson, K. L., Cook, L. W., Todd, M. J., Pierce, D., Hopkins, W. A., Jr., R. E. G., and Dorcas, M. E. (2005). Effects of prey type on specific dynamic action, growth, and mass conversion efficiencies in the horned frog, Ceratophrys cranwelli. Comparative Biochemistry and Physiology, Part A, pages 298--304. doi:10.1111/j.1748-1090.2012.00193.x.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [OrtiAlme2013] Ortiz, D., Almeida-Reinoso, D., and Coloma, A. (2013). Notes on husbandry, reproduction and development in the Pacific horned frog Ceratophrys stolzmanni (Anura: Ceratophryidae), with comments on its amplexus. International Zoo Yearbook, pages 151--162. doi:10.1111/j.1748-1090.2012.00193.x.