Danell, Kjell, and Kjells Sjöberg. “Seasonal Emergence of Chironomids in Relation to Egglaying and Hatching of Ducks in a Restored Lake (northern Sweden)”. Wildfowl 28 (November 1, 1977): 7. Accessed April 5, 2026. https://tidsskrift.dk/Wildfowl/article/view/154350.