Soveri, T., E. Helynranta, M. Nieminen, E. Yliselä, and L. A. Lindberg. “Histological changes in rumen epithelium of reindeer calves during the winter season”. Rangifer 10, no. 3 (September 1, 1990): 397. Accessed June 7, 2025. https://new.eludamos.org/index.php/rangifer/article/view/886.