OLSSON, Viking. The Red-backed Shrike Lanius collurio in southeastern Sweden: Habitat and territory. Ornis Svecica, Lund, Sweden, v. 5, n. 1, p. 31–41, 1995. DOI: 10.34080/os.v5.23012. Disponível em: https://journals.lub.lu.se/os/article/view/23012. Acesso em: 25 may. 2024.