1. Institute of Technical Sciences of SASA, Belgrade, Serbia
2. School of Electrical Engineering, University of Belgrade, Belgrade, Serbia
3. CEITEC BUT, Brno University of Technology, Brno, Czech Republic
4. Faculty of Mechanical Engineering, Brno University of Technology, Brno, Czech Republic
5. Serbian Academy of Sciences and Arts, Belgrade, Serbia
6. North Carolina Central University, Department of Mathematics and Physics, Durham, NC, USA