OLSSON, Viking. The Red-backed Shrike Lanius collurio in southeastern Sweden: Breeding biology. Ornis Svecica, Lund, Sweden, v. 5, n. 3–4, p. 101–110, 1995. DOI: 10.34080/os.v5.22999. Disponível em: https://journals.lub.lu.se/os/article/view/22999. Acesso em: 18 jul. 2024.