1. Faculty of Science and Technology J. Dlugosz University 13/15 Armii Krajowej Al. Czestochowa PL‐42‐201 Poland
2. Ivan Franko National University of Lviv 19 Dragomanov Street Lviv 79005 Ukraine
3. Faculty of Information Systems Physics and Mathematics Lesya Ukrainka Eastern European National University 9 Potapova Str. Lutsk UA‐43021 Ukraine
4. Department of General Physics Lviv Politechnic National University 12 Bandery Str. Lviv UA‐79013 Ukraine
5. Institute of Solid‐State Physics University of Latvia Riga LV 1063 Latvia
6. Laboratoire de Physique de la Matière Condensée UR 2081 University of Picardie Jules Verne Amiens 80039 France
7. CQUPT‐BUL Innovation Institute & College of Sciences Chongqing University of Posts and Telecommunications Chongqing 400065 China
8. Institute of Physics University of Tartu W. Ostwald Str 1 Tartu 50411 Estonia
9. Academy of Romanian Scientists Ilfov Str. No. 3 Bucharest 050044 Romania
10. Inorganic Chemistry Department Uzhhorod National University 46 Pidhirna Uzhhorod 88000 Ukraine