HÄYRINEN, U.; JÄRVINEN, O.; KOUKI, J. The bird sanctuary of Kesonsuo, a raised bog in North Karelia: its breeding bird assemblages, summer visitors and spring migrants. Ornis Fennica, [S. l.], v. 63, n. 4, p. 97–111, 1986. Disponível em: https://ornisfennica.journal.fi/article/view/133215. Acesso em: 18 may. 2024.