Dalby, Lars, Pär Söderquist, Thomas K. Christensen, Preben Clausen, Árni Einarsson, Johan Elmberg, Anthony D. Fox, Niklas Holmqvist, Tom Langendoen, Aleksi Lehikoinen, Åke Lindström, Svein-Håkon Lorentsen, Leif Nilsson, Hannu Pöysä, Jukka Rintala, and Arnór Þ. Sigfússon. 2013. “The Status of the Nordic Populations of the Mallard (Anas Platyrhynchos) in a Changing World”. Ornis Fennica 90 (1):2–15. https://doi.org/10.51812/of.133817.