Järvinen, A., and A. Rajasärkkä. “Population Fluctuations in Two Northern Land Bird Communities: Effects of Habitat, Migration Strategy and Nest-Site”. Ornis Fennica 69, no. 4 (December 31, 1992): 173–183. Accessed September 18, 2024. https://ornisfennica.journal.fi/article/view/133353.