Author(s):
1. Danijela Vuković, Elektrotehnički fakultet Univerziteta u Banjoj Luci, Republic of Srpska, Bosnia and Herzegovina
2. Blanka Škipina, Faculty of Technology Banja Luka, Republic of Srpska, Bosnia and Herzegovina
3. Duško Dudić, University of Belgrade, Vinča Institute of Nuclear Sciences, Serbia, Serbia