Russell, D. E., and W. A. Nixon. “Activity budgets, food habits and habitat selection of the Porcupine Caribou Herd during the summer insect season”. Rangifer 10, no. 3 (September 1, 1990): 255. Accessed December 20, 2024. https://septentrio.uit.no/index.php/rangifer/article/view/866.