HAFTORN, S. A brambling Fringilla montifringilla imitating the Chaffinch F. coelebs and Greenfinch Carduelis chloris. Ornis Fennica, [S. l.], v. 70, n. 2, p. 119–123, 1993. Disponível em: https://ornisfennica.journal.fi/article/view/133374. Acesso em: 21 may. 2024.