A.V. Snezhko - Post-graduate Student, Moscow Institute of Physics and Technology, Trainee Researcher, Kotelnikov IRE RAS (Moscow). E-mail: snezhko@cplire.ru
V.N. Gubankov - Dr.Sc. (Phys.-Math.), Head of Department, Kotelnikov IRE RAS (Moscow)
V.V. Pavlovsky - Research Scientist, Kotelnikov IRE RAS (Moscow)
A.V. Snezhko - Post-graduate Student, Moscow Institute of Physics and Technology; Trainee Research Scientist, Kotelnikov IRE RAS (Moscow)
E-mail: snezhko@cplire
V.N. Gubankov - Dr.Sc. (Phys.-Math.), Head of Department, Kotelnikov IRE RAS (Moscow)