Template:Pook et al., 2009
- Pook, C.E., Joger, U., Stümpel, N. & Wüster, W. 2009. When continents collide: phylogeny, historical biogeography and systematics of the medically important viper genus Echis (Squamata: Serpentes: Viperidae). Molecular Phylogenetics and Evolution 53: 792–807. DOI: 10.1016/j.ympev.2009.08.002
