Liljebäck, N., Koffijberg, K., Kowallik, C., Månsson, J. . and Andersson, Åke (2021) “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. Lund, Sweden, 31, pp. 125–138. doi: 10.34080/os.v31.22430.