1. Technical Department, University of Slavonski Brod, Trg Ivane Brlić Mažuranić 2, 35000 Slavonski Brod, Croatia
2. Department of Mechanical Engineering and Material Sciences, Institute of Engineering Sciences, University of Dunaújváros, Tancsics Mihaly 1//A, 2400 Dunaujvaros, Hungary
3. Mechanical Engineering Faculty, University of Slavonski Brod, Trg Ivane Brlić Mažuranić 2, 35000 Slavonski Brod, Croatia