Breznik, M. and Žlebnik, L. (1961) “Geologic conditions along the Drava river between Maribor and Ptuj with special regard to the construction of water power plants”, Geologija, 7(1), pp. 151–176. Available at: https://www.geologija-revija.si/index.php/geologija/article/view/1577 (Accessed: 27April2024).