Simonov, Evgeniy. “Unusual Colour Form of Siberian Pit Viper (<i>Gloydius H. halys</I>) from the Northern Edge of Its Area”. Acta Herpetologica 5, no. 1 (July 1, 2010): 87–89. Accessed November 23, 2024. https://oaj.fupress.net/index.php/ah/article/view/1584.