KOIVULA, K.; ORELL, M. Social rank and winter survival in the Willow Tit Parus montanus. Ornis Fennica, [S. l.], v. 65, n. 3, p. 114–120, 1988. Disponível em: https://ornisfennica.journal.fi/article/view/133265. Acesso em: 17 maj. 2024.