Maja Todorović, Marina Ćuk, Jana Štrbački, Petar Papić, Igor Jemcov . "Understanding and Importance of Rare Earth Elements in Hydrogeological Systems" in Proceedings of 4th Conference of the IAH CEG (Central European Group of IAH) and Guide of Geotrip of the IAH Karst Commision, University of Belgrade, Faculty of Mining and Geology, Department for Hydrogeology, Centre for Karst Hydrogeology (2018)