Joly, Kyle, Randi R. Jandt, Cynthia R. Meyers, and Martha J. Cole. 2007. “Changes in vegetative cover on Western Arctic Herd winter range from 1981 to 2005: potential effects of grazing and climate change”. Rangifer 27 (4):199-207. https://doi.org/10.7557/2.27.4.345.