Mallory, F.F., and T.L. Hillis. “Demographic Characteristics of Circumpolar Caribou Populations: Ecotypes, Ecological Constraints, Releases, and Population Dynamics”. Rangifer 18, no. 5 (March 1, 1998): 49–60. Accessed January 27, 2022. https://septentrio.uit.no/index.php/rangifer/article/view/1541.