Vollestad, Leif Asbjørn, and Børre Kind Dervo. “Density and Yield of the Noble Crayfish Astacus Astacus in the River Skotsbergelva, SE Norway”. Fauna norvegica 11 (December 31, 1990): 27-33. Accessed November 22, 2024. https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/6063.