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Author(s):
1. Vojislav V. Mitić, Univeristy of Niš, Faculty of Electronic Engineering, Serbia
2. Ljubiša Kocić, Univeristy of Niš, Faculty of Electronic Engineering, Serbia
3. Vesna Paunović, Univeristy of Niš, Faculty of Electronic Engineering, Serbia
4. Filip Bastić, Elektrotehnički fakultet, Univerzitet u Beogradu, Bulevar Kralja Aleksandra 73, Serbia
5. Zorica Mojović, IHTM - Institut za hemiju, tehnologiju i metalurgiju, Serbia
6. Dušan Jovanović, IHTM - Institut za hemiju, tehnologiju i metalurgiju, Serbia