1. Sumy State University, 2, Rimsky Korsakov Str., 40007 Sumy, Ukraine
2. East Kazakhstan State Technical University, 69 A.K. Protozanov Street, 070004 Ust-Kamenogorsk City, The Republic of Kazakhstan
3. Mark Wainwright Analytical Centre, University of New South Wales, Sydney, NSW 2052, Australia
4. National Institute for Material Science (NIMS), 3-13 Sakura, Ibaraki prefecture 305−0003, Japan
5. Sevchenko Research Institute of Applied Physical Problems, Belarussian State University, Minsk 220045, Belarus
6. Politechnika Lubelska, ul. Nadbystrzycka 38 D, 20−618 Lublin, Poland
7. Tele and Radio Research Institute, 11, Ratuszowa st., 03-450 Warsaw, Poland