1 literature reference for Vipera (pelias) ursinii VENCHI 2006:

Author: Venchi, Alberto and Roberto Sindaco
Year: 2006
Title: Annotated checklist of the reptiles of the Mediterranean countries, with keys to species identification. Part 2 -Snakes (Reptilia, Serpentes).
Source: Annali del Museo Civico di Storia Naturale "G. Doria", Genova, XCVIII: 259-364