Häyrinen, U., Järvinen, O. and Kouki, J. (1986) “The bird sanctuary of Kesonsuo, a raised bog in North Karelia: its breeding bird assemblages, summer visitors and spring migrants”, Ornis Fennica, 63(4), pp. 97–111. Available at: https://ornisfennica.journal.fi/article/view/133215 (Accessed: 18May2024).