Munro Jenssen , Bjørn, and Morten Ekker. “Dose Dependent Effects of Plumage-Oiling on Thermoregulation of Common Eiders Somateria Mollissima Residing in Water”. Polar Research 10, no. 2 (January 12, 1991): 579-584. Accessed April 6, 2026. https://polarresearch.net/index.php/polar/article/view/2339.