Åhman, Birgitta, and Gustaf Åhman. “Levels of 137Cs in Reindeer Bulls in July/August and September and the Effect of Early Slaughter”. Rangifer 10, no. 5 (September 1, 1990): 34-36. Accessed August 15, 2020. https://septentrio.uit.no/index.php/rangifer/article/view/956.