Authors
Martin Králik
Institute of Aurel Stodola, Faculty of Electrical Engineering, University of Žilina, Liptovský Mikuláš, Slovakia
Stanislav Jurečka
Institute of Aurel Stodola, Faculty of Electrical Engineering, University of Žilina, Liptovský Mikuláš, Slovakia
Emil Pinčík
Institute of Physics, Slovak Academy of Sciences, Bratislava, Slovakia