Koskimies, P., and P. Saurola. “Autumn Migration Strategies of the Sedge Warbler Acrocephalus Schoenobaenus in Finland: A Preliminary Report”. Ornis Fennica 62, no. 4 (December 31, 1985): 145–152. Accessed November 26, 2024. https://ornisfennica.journal.fi/article/view/133190.