Hesthagen, T., and R. Saksgård. “Arctic Charr (Salvelinus Alpinus) Re-Established in a Formerly Acidified and Highly Dilute Mountain Lake under Declining Acidic Deposition”. Fauna Norvegica, vol. 38, Sept. 2018, pp. 30-36, doi:10.5324/fn.v38i0.2272.