Meininger, P. L. and Snoek, H. (1992) “Non-breeding Shelduck Tadorna tadorna in the southwest Netherlands: effects of habitat changes on distribution, numbers, moulting sites and food”, Wildfowl, pp. 139–151. Available at: https://tidsskrift.dk/Wildfowl/article/view/155350 (Accessed: 16 December 2025).