1. University of Belgrade, Faculty of Mechanical Engineering, Beograd, Serbia
2. bDepartment of Mathematics, College of Science and Humanities in Alkharj, Prince Sattam bin Abdulaziz University, Al-Kharj, Saudi Arabia + Department of Mathematics and Computer Science, St. Thomas College, Bhilai, Chhattisgarh, India
3. Department of Engineering Science, Bandırma Onyedi Eylul University, Bandırma, Balıkesir, Turkey
4. University of Banja Luka, Faculty of Electrical Engineering, Banja Luka, Bosnia and Herzegovina
5. University of East Sarajevo, Faculty of Transport and Traffic Engineering, Doboj, Bosnia and Herzegovina