ANDERSSON, Åke; FOLLESTAD, Arne; NILSSON, Leif; PERSSON, Hakon. Migration patterns of Nordic Greylag Geese Anser anser. Ornis Svecica, Lund, Sweden, v. 11, n. 1–2, p. 19–58, 2001. DOI: 10.34080/os.v11.22859. Disponível em: https://journals.lub.lu.se/os/article/view/22859. Acesso em: 11 dec. 2023.