Staaland, H., and R. G. White. “REGIONAL VARIATION IN MINERAL CONTENTS OF PLANTS AND ITS SIGNIFICANCE FOR MIGRATION BY ARCTIC REINDEER AND CARIBOU”. Alces: A Journal Devoted to the Biology and Management of Moose, vol. 37, no. 2, Jan. 2001, pp. 497-09, https://alcesjournal.org/index.php/alces/article/view/611.