1. Department for Postgraduate Studies, Singidunum University, 11000 Belgrade, Serbia
2. PUC Infostan Technologies, 11000 Belgrade, Serbia
3. Singidunum University, 11000 Belgrade, Serbia
4. Science Technology Park Niš, 18104 Niš, Serbia
5. Faculty of Diplomacy and Security, University Union-Nikola Tesla Belgrade, 11000 Beograd, Serbia
6. Faculty of Engineering, University of Kragujevac, 34000 Kragujevac, Serbia