Autori:
1. Milan Pavlović, College of Applied Technical Sciences Niš, 2. Vlastimir Nikolic, Univerzitet u Nišu, Mašinski fakultet, Serbia
3. Ivan Ćirić, Univerzitet u Nišu, Mašinski fakultet, Serbia
4. Milica Ćirić, Faculty of Civil Engineering and Architecture in Niš, Serbia

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