Carrasco, P. A., Harvey, M. B. and Saravia, A. M. (2009) “The rare Andean pitviper Rhinocerophis jonathani (Serpentes: Viperidae: Crotalinae): redescription with comments on its systematics and biogeography”, Zootaxa. Auckland, New Zealand, 2283(1), pp. 1–15. doi: 10.11646/zootaxa.2283.1.1.