Author(s):
1. Jelena Tanasić, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia
2. Milena Marinović-Cincović, University of Belgrade, Vinča Institute of Nuclear Sciences, Serbia, Serbia
3. Nevena Vukic, University of Novi Sad, Faculty of Technology, Serbia, Serbia
4. Gordana Markovic, Tigar A.D., Pirot, Serbia
5. Darko Manjencic, University of Novi Sad, Faculty of Technology, Serbia, Serbia
6. Radmila Radicevic, University of Novi Sad, Faculty of Technology, Serbia, Serbia
7. Jaroslava Budinski-Simendic, Univerzitet u Novom Sadu, Tehnološki fakultet, Novi Sad, Serbia

Abstract