Ingólfsson, Ólafur, and Øystein Wiig. “Late Pleistocene Fossil Find in Svalbard: The Oldest Remains of a Polar Bear (Ursus Maritimus Phipps, 1744) Ever Discovered”. Polar Research, vol. 28, no. 3, Dec. 2009, pp. 455-62, doi:10.3402/polar.v28i3.6131.