ALLAYE-CHAN, A. C.; WHITE, R. G.; HOLLEMAN, D. F.; RUSSELL, D. E. 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, [S. l.], v. 10, n. 3, p. 17–24, 1990. DOI: 10.7557/2.10.3.816. Disponível em: https://septentrio.uit.no/index.php/rangifer/article/view/816. Acesso em: 8 dec. 2021.