1. Department of Fundamental Sciences, Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia
2. Department of Power, Electronics, and Communications Engineering, Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia
3. Department of Electrical and Computer Engineering, Carnegie Mellon University, Pittsburgh, PA, USA
4. Department of Mathematics and Informatics, Faculty of Sciences, University of Novi Sad, Novi Sad, Serbia
5. Amazon.com, Inc., Alexa AI, Pittsburgh, PA, USA