Allaye-Chan, A. C., R. G. White, D. F. Holleman, and D. E. Russell. “Seasonal concentrations of cesium-137 in rumen content, skeletal muscles and feces of caribou from the Porcupine herd: lichen ingestion rates and implications for human consumption”. Rangifer 10, no. 3 (September 1, 1990): 17–24. Accessed March 29, 2024. https://septentrio.uit.no/index.php/rangifer/article/view/816.