NILSSON, L. Distribution and numbers of wintering sea ducks in Swedish offshore waters. Ornis Svecica, Lund, Sweden, v. 22, n. 1–2, p. 39–59, 2012. DOI: 10.34080/os.v22.22595. Disponível em: https://journals.lub.lu.se/os/article/view/22595. Acesso em: 16 may. 2022.