Acosta Chaves, V., Ballestero, E., Batista, A., Chaves, G., Ibáñez, R., Ines Hladki, A., Jaramillo, C., Lamar, W., Ramírez Pinilla, M., Renjifo, J., Solórzano, A. & Urbina, N. (2017). "Polychrus gutturosus". IUCN Red List of Threatened Species. 2017. Retrieved 17 May 2019.{{cite journal}}: CS1 maint: multiple names: authors list (link)
