HebblewhiteM., WhittingtonJ., BradleyM., SkinnerG., DibbA., and WhiteC. A. “Conditions for Caribou Persistence in the Wolf-Elk-Caribou Systems of the Canadian Rockies”. Rangifer, Vol. 27, no. 4, Apr. 2007, pp. 79-91, doi:10.7557/2.27.4.322.