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N. Kunicina
Riga Technical University, Faculty of Power and Electrical Engineering, Institute of Industrial Electronics and Electrical Engineering, 1 Kronvalda Blvd., Riga, LV-1010, LATVIA
A. Zabasta
Riga Technical University, Faculty of Power and Electrical Engineering, Institute of Industrial Electronics and Electrical Engineering, 1 Kronvalda Blvd., Riga, LV-1010, LATVIA
K. Kondratjevs
Riga Technical University, Faculty of Power and Electrical Engineering, Institute of Industrial Electronics and Electrical Engineering, 1 Kronvalda Blvd., Riga, LV-1010, LATVIA
G. Asmanis
Riga Technical University, Faculty of Power and Electrical Engineering, Institute of Industrial Electronics and Electrical Engineering, 1 Kronvalda Blvd., Riga, LV-1010, LATVIA