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Author(s):
1. Predrag Dašić, SaTCIP Publisher Ltd., 36610 Vrnjačka Banja i Visoka tehnička mašinska škola strukovnih studija (VTM, Serbia
2. Mitar Lutovac, FM Herceg Novi , Montenegro
3. Violeta Đorđević, Akademija strukovnih studija Šumadija (ASSŠ) – Odsek Trstenik, Trstenik (Srbija), Serbia
4. Zvonko Petrović, Akademija strukovnih studija Šumadija (ASSŠ) – Odsek Trstenik, Trstenik (Srbija), Serbia
Abstract