Author(s):
1. Milentije Stefanović, Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Srbija 2IMW Ins, Serbia
2. Vesna Mandić, Faculty of Engineering, University of Kragujevac, Sestre Janjić 6, 34000 Kragujevac, Srbija 2IMW Ins, Serbia
3. Srbislav Aleksandrovic, Fakultet inženjerskih nauka Univerziteta u Kragujevcu, Serbia
4. Zvonko Gulisija, Institut za tehnologiju nuklearnih i drugih mineralnih sirovina, Serbia
5. Aleksandra Patarić, ITNMS, Serbia