NILSSON, L. Forty years of midwinter counts of waterfowl along the coasts of Scania, south Sweden, 1964—2003. Ornis Svecica, Lund, Sweden, v. 15, n. 3, p. 127–148, 2005. DOI: 10.34080/os.v15.22739. Disponível em: https://journals.lub.lu.se/os/article/view/22739. Acesso em: 2 oct. 2022.