SORJONEN, J. Long-term constancy of two rain-call dialects of the Chaffinch Fringilla coelebs in Finnish and Russian Karelia. A consequence of site fidelity?. Ornis Fennica, [S. l.], v. 78, n. 2, p. 73–82, 2001. Disponível em: https://ornisfennica.journal.fi/article/view/133549. Acesso em: 21 sep. 2024.