Sarmaja-Korhonen, K., and H. Hyvärinen. “Cladocerean and Diatom Stratigraphy of Calcareous Lake Sediments from Kuusamo, NE Finland. Indications of Holocene Lake-Level Changes”. Fennia - International Journal of Geography, vol. 177, no. 1, Jan. 1999, pp. 55-70, https://fennia.journal.fi/article/view/8933.