Platteeuw, Maarten, and Rene J H G Henkens. “Waterbirds and Aquatic Recreation at Lake Ijsselmeer, The Netherlands: The Potential for Conflict”. Wildfowl (January 1, 1997): 210–224. Accessed February 13, 2026. https://tidsskrift.dk/Wildfowl/article/view/154111.