1. School of Mechatronic Engineering Xi'an Technological University Xi'an China
2. Department of Management Information System, Faculty of Economics and Administration King Abdulaziz University Jeddah Saudi Arabia
3. Faculty of Mathematics and Computer Science ALFA BK University Belgrade Serbia
4. Faculty of Sciences and Mathematics University of Priština in Kosovska Mitrovica Kosovska Mitrovica Serbia
5. Pedagogical Faculty in Vranje University of Niš Vranje Serbia