Dolmen, Dag, and Einar Kleiven. “The Impact of Acidic Precipitation and Eutrophication on the Freshwater Pearl Mussel Margaritifera Margaritifera (L.) in Southern Norway”. Fauna norvegica 24 (December 31, 2004): 7-18. Accessed November 22, 2024. https://www.ntnu.no/ojs/index.php/fauna_norvegica/article/view/5943.