Sándor, Imola, et al. “Daily Activity of the Hungarian Meadow Viper (Vipera Ursinii Rakosiensis) under Seminatural Conditions”. Animal Welfare, Ethology and Housing Systems (AWETH), vol. 6, no. 1, Apr. 2010, pp. 69-83, https://journal.uni-mate.hu/index.php/aweth/article/view/6814.