Author(s):
1. Jasmina Nešković, Mining institute, Belgrade, Serbia, Serbia
2. Klara K. Janković, Mining institute, Belgrade, Serbia, Serbia
3. Pavle Stjepanović, Mining institute, Belgrade, Serbia, Serbia
4. Ivana Jovanović, Mining and Metallurgy Institute Bor, Serbia
5. Dejan Lazić, Mining institute, Belgrade, Serbia, Serbia

Abstract