CUADRAGO, M.; HASSELQUIST, D. Age-related difference in return rate of Willow Warblers Phylloscopus trochilus at two breeding sites in Sweden. Ornis Fennica, [S. l.], v. 71, n. 4, p. 137–143, 1994. Disponível em: https://ornisfennica.journal.fi/article/view/133404. Acesso em: 18 maj. 2024.