Eriksson, Olof, Mats Sandewall, and Erik Wilhelmsson. “A model for analyzing influence of timber production on lichens for reindeer grazing”. Rangifer 7, no. 2 (June 1, 1987): 15–32. Accessed April 19, 2024. https://septentrio.uit.no/index.php/rangifer/article/view/712.