Eronen, Matti, Olavi Heikkinen, and Matti Tikkanen. “Holocene Development and Present Hydrology of Lake Pyhäjärvi in Satakunta, Southwestern Finland”. Fennia - International Journal of Geography 160, no. 2 (February 1, 1982): 195–223. Accessed May 11, 2024. https://fennia.journal.fi/article/view/9115.