Schemes including Vipera berus

• IUCN Red List of Threatened Species. Version 2012.1 Vipera berus
• The Reptile Database (Vipera_berus) Vipera berus
• IUCN Red List of Threatened Species. Version 2012.2 (157248) Vipera berus
• GBIF (5960862) Vipera berus