KÄLLANDER, H. Dangerous exploration: nest-cavity inspections by male Pied Flycatchers Ficedula hypoleuca. Ornis Svecica, Lund, Sweden, v. 4, n. 1, p. 49–52, 1994. DOI: 10.34080/os.v4.23032. Disponível em: https://journals.lub.lu.se/os/article/view/23032. Acesso em: 2 oct. 2022.