1.
Phenotypic variations and melanism in an introduced population of the adder Vipera berus in eastern Belgium ; Variations phénotypiques et mélanisme au sein d'une population introdu...
2.
3.
4.
5.
6.
Status of a large population of the Adder Vipera berus (Linnaeus, 1758) introduced in eastern Belgium ; Statut d'une vaste population de Vipère péliade Vipera berus (Linnaeus, 1758...