A. M. Bobreshov – Dr.Sc. (Phys.-Math.), Professor,

Voronezh State University (Voronezh)

G. K. Uskov – Dr.Sc. (Phys.-Math.), Associate Professor,

Voronezh State University (Voronezh)

E-mail: Uskov@phys.vsu.ru

D. P. Kondratyev – Student,

Voronezh State University (Voronezh)

E-mail: kondratyev777@gmail.com

S. E. Neskorodov – Post-graduate Student,

Voronezh State University (Voronezh)

Constructor,

PC «Concern «Sozvezdie» (Voronezh)

E-mail: neskorodov93@mail.ru