Author(s):
1. Nikola Davidović, University of East Sarajevo, Faculty of Electrical Engineering, Republic of Srpska, Bosnia and Herc, Republic of Srpska, Bosnia and Herzegovina
2. Slobodan Obradović, Elektrotehnički fakultet, Univerzitet u Istočnom Sarajevu::, Republic of Srpska, Bosnia and Herzegovina
3. Borivoje Milošević, Univerzitet UNION - Nikola Tesla Beograd, Srbija, Serbia

Final paper