Kumpula, J., K. Kumpula, and M. Nieminen. “Dominance relationships among female semi-domesticated reindeer: the function of antlers”. Rangifer 12, no. 3 (October 1, 1992): 173–174. Accessed April 18, 2025. https://new.eludamos.org/index.php/rangifer/article/view/1038.