Bergerud, Arthur T., and Stuart N. Luttich. “Predation risk and optimal foraging trade-off in the demography and spacing of the George River Herd, 1958 to 1993”. Rangifer 23, no. 5 (April 1, 2003): 169–191. Accessed March 28, 2024. https://septentrio.uit.no/index.php/rangifer/article/view/1699.