1. Department of Electrical Engineering and Mechatronics, Faculty of Electrical Engineering and Informatics, Technical University of Kosice, Letna 9, 042 00 Kosice, Slovakia
2. Research and Innovation division, Central European Institute of Technology, Univerzitna 8661/6A, 010 15 Zilina, Slovakia
3. Department of Industrial Engineering, Faculty of Mechanical Engineering, University of Zilina, Univerzitna 8215/1, 010 26 Zilina, Slovakia