"1997"^^ . "Saviozzi & Zuffi (1997)" . "1997"^^ . . . . "Saviozzi & Zuffi (1997)" . "Saviozzi, P. & Zuffi, M. a. L. 1997. An integrated approach to the study of diet of Vipera aspis. Herpetological Review, 28(1): 23-24." .