Kralj, Polona, and Bernarda Bole. “Chemical Composition of Cave Sediment in Potočka Zijalka, Mt. Olševa, North Slovenia”. Geologija 46, no. 1 (June 30, 2003): 123–128. Accessed April 27, 2024. https://www.geologija-revija.si/index.php/geologija/article/view/984.