Autori:
1. Mladen Tomić, The School of Higher Technical Professional Education, Niš, Serbia
2. Biljana Milutinović, College of Applied Technical Sciences Niš, Serbia
3. Predrag Živković, Univerzitet u Nišu, Mašinski fakultet, Serbia
4. Petar Djekic, The School of Higher Technical Professional Education, Niš, Serbia
5. Mirjana Laković, Univerzitet u Nišu, Mašinski fakultet, Serbia

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