NygÃ¥rd, Torgeir, BjÃ¸rn Frantzen, and Saulius Å vaÅ¾as. 1995. “Steller’s Eiders Polysticta Stelleri Wintering in Europe: Numbers, Distribution and Origin”. Wildfowl, January, 140-56. https://tidsskrift.dk/Wildfowl/article/view/154659.