Document Type : Original Research Paper
Authors
1 University of Belgrade, Technical faculty in Bor, Vojske Jugoslavije 12, 19210 Bor, Serbia
2 Mining and Metallurgy Institute Bor, Zeleni bulevar 35, 19210 Bor, Serbia
3 Clinical Center of Niš, Bulevar dr Zorana Đinđića 48, 18000 Niš, Serbia
4 Faculty of Sciences and Mathematics, University of Niš, PO Box 224, 18001 Niš, Serbia
Abstract
Keywords