Salvidio, Sebastiano, Paolo Cresta, and Dag Dolmen. “The Common Toad Bufo Bufo Population of Hitra Island, Central Norway”. Fauna norvegica 14 (December 31, 1993): 51-55. Accessed November 22, 2024. https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/6038.