Staaland, Hans, and Torstein Garmo. “A Note on the Manipulation of Sodium and Potassium Concentrations in the Rumen of Reindeer and the Possible Effect on Digestibility”. Rangifer 7, no. 2 (June 1, 1987): 33–36. Accessed December 7, 2022. https://septentrio.uit.no/index.php/rangifer/article/view/713.