Helle, T., J. Aspi, and S.-S. Kilpelä. “The Effects of Stand Characteristics on Reindeer Lichens and Range Use by Semi-Domesticated Reindeer”. Rangifer 10, no. 3 (September 1, 1990): 107–114. Accessed September 2, 2026. https://septentrio.uit.no/index.php/rangifer/article/view/839.