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Dirksen, L.; Böhme, W. 2005 Gloydius halys - Halysotter. pp. 7-22. In: Joger, U. & Stümpel, N. (eds.). Handbuch der Reptilien und Amphibien Europas. Schlangen III. Viperidae. AULA-Verlag, Wiebelsheim. 420 pp. |