L. Forró szerk.: Miscellanea Zoologica Hungarica 8. 1993 (Budapest, 1993)

Janisch, M.: A mutant form of the meadow viper (Vipera ursinii rakosiensis Méhely) from Hungary with a peculiar colour pattern

Fig. 1. The mutant meadow viper form in the original habitat Fig. 2. The mutant female (right) and a female with normal colouration (left)