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Nilson, G.; Andrén, C. 1986 A review of the Vipera xanthina complex (Reptilia: Viperidae). pp. 223-225. In: Rocek, Z. (ed.). Studies in herpetology. Proceedings of the European herpetological meeting (3rd ordinary general meeting of the Societas Europaea Herpetologica), Prague 1985. Charles University, Prague. 754 pp.