Heiskari, Ulla, and Mauri Nieminen. “Fibre Content and in Vitro Digestibility of Natural Forage and Supplementary Fodder in Reindeer”. Rangifer 8, no. 2 (June 1, 1988): 66. Accessed August 24, 2026. https://septentrio.uit.no/index.php/rangifer/article/view/754.