Liljebäck, Niklas, Kees Koffijberg, Christine Kowallik, Johan Månsson, and Åke Andersson. “Use of Foster Parents in Species Conservation May Cause Conflicting Objectives: Hybridization Between Lesser White-Fronted Goose Anser Erythropus and Barnacle Goose Branta Leucopsis”. Ornis Svecica 31 (October 19, 2021): 125–138. Accessed January 22, 2022. https://journals.lub.lu.se/os/article/view/22430.