Woog, Friederike, Jana Maierhofer, and Holger Haag. “Endoparasites in the Annual Cycle of Feral Greylag Geese Anser Anser”. Wildfowl 61 (April 16, 2013): 166–181. Accessed May 25, 2026. https://tidsskrift.dk/Wildfowl/article/view/153557.