Jenni-Eiermann, Susanne, and Luc Schifferli. “Body Composition of Starved Tufted Ducks Aythya Fuligula, Pochards A. Ferina and Little Grebes Tachybaptus Ruficollis”. Wildfowl 40 (November 1, 1989): 99–105. Accessed April 15, 2026. https://tidsskrift.dk/Wildfowl/article/view/154008.