1. University of Kragujevac, Faculty of Engineering, Kragujevac, Serbia
2. Department of Energy Engineering, College of Engineering, University of Baghdad, Baghdad, Iraq
3. Hamburg University of Technology, Hamburg, Germany
4. Department of Mechanics, Al-Farabi Kazakh National University, Almaty, Kazakhstan
5. Academy of Professional Studies Sumadija, Department in Trstenik, Trstenik, Serbia