1.
Swennen C, Duiven P, Wintermans GJM. Abnormal plumage in possibly senile female Eiders Somateria mollissima. Wildfowl [Internet]. 1989 Nov. 1 [cited 2026 Apr. 15];40:127-30. Available from: https://tidsskrift.dk/Wildfowl/article/view/154006