Josefsen, Terje D., Tove H. Aagnes, and Svein D. Mathiesen. 1996. “Influence of diet on the morphology of the ruminal papillae in reindeer calves (Rangifer tarandus tarandus L.)”. Rangifer 16 (3):119-28. https://doi.org/10.7557/2.16.3.1205.