L.V. Kuzmin - Dr. Sc. (Phys.-Math.), Kotel\'nikov IRE of RAS (Moscow). E-mail: lvk@cplire.ru
R.Yu. Emel\'yanov - Kotel\'nikov IRE of RAS (Moscow). E-mail: chaos@cplire.ru
A.M. Bobreshov - Dr. Sc. (Phys.-Math.), Professor, Department of Electronics, Dean of Faculty of Physics, Voronezh State University
E-mail: bobreshov@phys.vsu.ru
S.E. Neskorodov - Post-graduate Student, Voronezh State University
E-mail: neskorodov93@mail.ru
G.K. Uskov - Dr. Sc. (Phys.-Math.), Associate Professor, Department of Electronics, Faculty of Physics, Voronezh State University
E-mail: uskov@phys.vsu.ru
