Norberg, Harri J., and Svein D. Mathiesen. “Feed intake, gastrointestinal system and body composition in reindeer calves fed early harvested first cut timothy silage (Phleum pratense)”. Rangifer 18, no. 2 (February 1, 1998): 65–72. Accessed May 29, 2023. https://septentrio.uit.no/index.php/rangifer/article/view/1447.