1. Breeding ecology of an Eider population on Spitsbergen;Ahlén;Ornis Scand.,1970
2. Patagial tags for waterfowl;Anderson;J. Wildl. Mgt.,1963
3. Variations in clutch size in relation to the food supply;Bengtson;Ways of adaptations of terrestrial vertebrata to the living conditions in the Subarctic,1971
4. Untersuchungen über die Nistvogelfauna in einem Schärengebeit westlich von Helsingfors;Bergman;Acta 2001. Fenn.,1939