Author(s):
1. Hana Stefanovic, Visoka skola stukovnih studija za IT, Serbia
2. Slobodan Obradovic, Visoka skola stukovnih studija za IT, Serbia
3. Nikola Davidović, University of East Sarajevo, Faculty of Electrical Engineering, Republic of Srpska, Bosnia and Herc, Republic of Srpska, Bosnia and Herzegovina