1. Faculty of Technical Sciences, Computing and Control Engineering Department, University of Novi Sad, Trg D. Obradovića 6, 21000 Novi Sad, Serbia
2. JP Srbijagas, Technical Provision Section, Narodnog Fronta 12, Novi Sad, Serbia
3. School of Electrical Engineering Stari Grad, Visokog Stevana 37, 11000 Belgrade, Serbia