HELDBJERG, H.; KARLSSON, L. Autumn migration of Blue Tit Parus caeruleus at Falsterbo, Sweden 1980–94: population changes, migration patterns and recovery analysis. Ornis Svecica, Lund, Sweden, v. 7, n. 3–4, p. 149–167, 1997. DOI: 10.34080/os.v7.22968. Disponível em: https://journals.lub.lu.se/os/article/view/22968. Acesso em: 7 jul. 2022.