HEDENSTRÖM, A.; PETTERSSON, J. Migration routes and wintering areas of Willow Warblers Phylloscopus trochilus (L.) ringed in Fennoscandia. Ornis Fennica, [S. l.], v. 64, n. 4, p. 137–143, 1987. Disponível em: https://ornisfennica.journal.fi/article/view/133244. Acesso em: 18 may. 2024.