Åhman, Birgitta, Axel Rydbeg, and Gustaf Åhman. “Macrominerals in Free-Ranging Swedish Reindeer During Winter”. Rangifer 6, no. 2 (June 1, 1986): 31-38. Accessed January 26, 2020. https://septentrio.uit.no/index.php/rangifer/article/view/558.