Lutz, B., Siemens AG, Energy Management, Nonnendammallee 104, 13629 Berlin Lv, Q., Shenzhen Power Supply Bureau, Shenzhen 518020 Lyushkevich, V., B.I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus, Nezavisimosti ave. 70,
220072 Minsk
