RYTKÖNEN, S.; KOIVULA, K.; LINDGREN, E. The population size and breeding biology of the Rook (Corvus frugilegus) in northern Finland. Ornis Fennica, [S. l.], v. 70, n. 4, p. 202–212, 1993. Disponível em: https://ornisfennica.journal.fi/article/view/133383. Acesso em: 1 nov. 2024.