Степна усойница (Bulgarian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Степна усойница" in Bulgarian language version.

refsWebsite

Global rank Bulgarian rank

88^th place

4^th place

3,024^th place

2^nd place

low place

38^th place

bas.bg

Vipera ursinii (Bonaparte, 1835). // IUCN Red List of Threatened Species. International Union for Conservation of Nature. Посетен на 2 януари 2023 г. (на английски)
Joger, Ulrich; Crnobrnja Isailovic, Jelka; Vogrin, Milan; Corti, Claudia; Sterijovski, Bogoljub; Westerström, Alexander; Krecsák, László; Pérez Mellado, Valentin; Sá-Sousa, Paulo; Cheylan, Marc; Pleguezuelos, Juan M.; Sindaco, Roberto. Vipera ursinii // IUCN Red List of Threatened Species. Version 2011.1. International Union for Conservation of Nature, 2008. Посетен на 5 юли 2011. (на английски)