AagnesT.H., and MathiesenS.D. “Food and Snow Intake, Body Mass and Rumen Function in Reindeer Fed Lichen and Subsequently Starved for 4 Days”. Rangifer 14, no. 1 (December 1, 1994): 33-37. Accessed February 24, 2020. https://septentrio.uit.no/index.php/rangifer/article/view/1131.