[1] Technol Univ Czestochowa, Dept Elect Engn, Czestochowa, Poland
[2] Univ S Bohemia, Inst Phys Biol, Nove Hrady 37333, Czech Republic
[3] Acad Sci, Inst Syst Biol & Ecol, Nove Hrady 37333, Czech Republic
[4] Mil Univ Technol, Inst Appl Phys, PL-00908 Warsaw, Poland
[5] Fdn Res & Technol Hellas FORTH, Inst Chem Engn & High Temp Chem Proc, GR-26504 Patras, Greece
[6] Univ Patras, Dept Phys, GR-26500 Patras, Greece
[7] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia
[8] Inst Elect Mat Technol, PL-01919 Warsaw, Poland