1. Mining and Metallurgy Institute Bor, Zeleni Bulevar 35, 19210 Bor, Serbia
2. Technical Faculty in Bor, University of Belgrade, Vojske Jugoslavije 12, P.O. Box 50, 19210 Bor, Serbia
3. Faculty of Technology and Metallurgy, University of Belgrade, Karnegijeva 4, 11000 Belgrade, Serbia