Haftorn, S. (1993) “A brambling Fringilla montifringilla imitating the Chaffinch F. coelebs and Greenfinch Carduelis chloris”, Ornis Fennica, 70(2), pp. 119–123. Available at: https://ornisfennica.journal.fi/article/view/133374 (Accessed: 22November2024).