BORGSTRÖM, E. Findings from a long-term study of the breeding biology of a Scandinavian population of the Great Tit Parus major. Ornis Svecica, Lund, Sweden, v. 17, n. 2, p. 65–74, 2007. DOI: 10.34080/os.v17.22688. Disponível em: https://journals.lub.lu.se/os/article/view/22688. Acesso em: 6 jul. 2022.