Drovenik, Matija, and Mihael Pungartnik. “Origin of the Zinc-Lead Ore Deposit Topla and Its Particularities”. Geologija 30, no. 1 (December 31, 1987): 245–314. Accessed June 2, 2023. https://www.geologija-revija.si/index.php/geologija/article/view/595.