Jankovská, Vlasta, Yrjö Vasari, G. A. Elina, and O. L. Kuznetskov. 1999. “The Holocene Palaeogeography of Paanajärvi National Park, Northwestern Russia”. Fennia - International Journal of Geography 177 (1):71-82. https://fennia.journal.fi/article/view/8934.