Tømmervik, H., B. E. Johansen, and A. N. Eira. “Mapping the Air Pollution Impact to Reindeer Range Areas in Pasvik, Northern Norway Using Satellite Imageries”. Rangifer 10, no. 4 (September 1, 1990): 19-20. Accessed April 12, 2021. https://septentrio.uit.no/index.php/rangifer/article/view/907.