Russell, Donald E., Debbie van de Wetering, Robert G. White, and Karen L. Gerhart. “Oil and the Porcupine Caribou Herd — Can We Quantify the Impacts?”. Rangifer 16, no. 4 (January 1, 1996): 255-258. Accessed October 29, 2020. https://septentrio.uit.no/index.php/rangifer/article/view/1252.