SOVINEN, M. The Red-flanked Bluetail, Tarsiger cyanurus (Pall), spreading into Finland. Ornis Fennica, [S. l.], v. 29, n. 1, p. 27–35, 1952. Disponível em: https://ornisfennica.journal.fi/article/view/132544. Acesso em: 25 dec. 2024.