MIKKONEN, A. V. Spring flocking of the Chaffinch Fringilla coelebs and the Brambling F. montifringilla in northern Finland. Ornis Fennica, [S. l.], v. 61, n. 2, p. 33–53, 1984. Disponível em: https://ornisfennica.journal.fi/article/view/133145. Acesso em: 17 touko. 2024.