Urbanc, Janko, and Bojan Lajlar. “Interpretation of Groundwater Origin in the Velenje Coal Mine on the Basis of Isotope Composition”. Geologija 45, no. 2 (December 31, 2002): 595–598. Accessed March 3, 2024. https://www.geologija-revija.si/index.php/geologija/article/view/1689.