OLSSON, Viking. Polygyny in the Red-backed Shrike Lanius collurio. Ornis Svecica, Lund, Sweden, v. 11, n. 1–2, p. 97–99, 2001. DOI: 10.34080/os.v11.22865. Disponível em: https://journals.lub.lu.se/os/article/view/22865. Acesso em: 30 jun. 2024.