KOPIJ, Grzegorz. Territoriality in the Willow Warbler Phylloscopus trochilus in its winter quarter in Lesotho. Ornis Svecica, Lund, Sweden, v. 19, n. 1, p. 50–54, 2009. DOI: 10.34080/os.v19.22658. Disponível em: https://journals.lub.lu.se/os/article/view/22658. Acesso em: 29 mar. 2024.