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D. Hilse
University of Bielsko-Biala, Faculty of Materials, Civil and Environmental Engineering, Institute of Environmental Protection and Engineering, ul. Willowa 2, 43-309 Bielsko-Biala, POLAND
J. Kapała
University of Bielsko-Biala, Faculty of Materials, Civil and Environmental Engineering, Institute of Environmental Protection and Engineering, ul. Willowa 2, 43-309 Bielsko-Biala, POLAND
K. Sztymelski
Silesian University of Technology, Faculty of Electrical Engineering, Institute of Industrial Electrical Engineering and Computer Science, ul. Akademicka 10, 44–100 Gliwice, POLAND
N. Zeltins
Latvian Member Committee of WEC, Akademijas laukums 1-1, LV-1050, Riga, LATVIA
J. Ekmanis
Latvian Member Committee of WEC, Akademijas laukums 1-1, LV-1050, Riga, LATVIA