FRANZ, J. Ornithologische Winterbeobachtungen bei Alakurtti (NO-Finnland). Ornis Fennica, [S. l.], v. 19, n. 4, p. 88–91, 1942. Disponível em: https://ornisfennica.journal.fi/article/view/132436. Acesso em: 26 dec. 2024.