Johnsen, Bjørn Ove, Arne Johan Jensen, and Bjørn Sivertsen. 1989. “Extermination of Gyrodactylus Salaris – Infected Atlantic Salmon Salmo Salar by Rotenone Treatment in the River Vikja, Western Norway”. Fauna Norvegica 10 (December):39-43. https://doi.org/10.5324/fn.v10i0.6076.