NILSSON, L. Wintering swans Cygnus spp. and Coot Fulica atra in the Öresund, South Sweden, in relation to available food recources. Ornis Svecica, Lund, Sweden, v. 15, n. 1, p. 13–21, 2005. DOI: 10.34080/os.v15.22748. Disponível em: https://journals.lub.lu.se/os/article/view/22748. Acesso em: 24 sep. 2022.