Grad, Karel, and Bojan Ogorelec. “Upper Permian, Scythian, and Anisian Rocks in the Žiri Area”. Geologija 23, no. 2 (June 30, 1980): 189–220. Accessed April 14, 2024. https://www.geologija-revija.si/index.php/geologija/article/view/471.