Šoster, Aleš, Janez Zavašnik, Mihael Ravnjak, and Uroš Herlec. “REE-Bearing Minerals in Drava River Sediments, Slovenia, and Their Potential Origin”. Geologija 60, no. 2 (December 31, 2017): 257–266. Accessed April 19, 2024. https://www.geologija-revija.si/index.php/geologija/article/view/1404.