NILSSON, S. G.; ALERSTAM, T. Resource division among birds in North Finnish coniferous forest in autumn. Ornis Fennica, [S. l.], v. 53, n. 1, p. 15–27, 1976. Disponível em: https://ornisfennica.journal.fi/article/view/132894. Acesso em: 16 may. 2024.