NILSSON, L. Spring staging of Eiders Somateria mollissima in some Swedish east coast archipelagos and at Gotland 2009 and 2010. Ornis Svecica, Lund, Sweden, v. 25, n. 1–2, p. 70–73, 2015. DOI: 10.34080/os.v25.22550. Disponível em: https://journals.lub.lu.se/os/article/view/22550. Acesso em: 2 oct. 2022.