S.D. Makhortov - Dr. Sc. (Phys.-Math.), Associate Professor, Head of Department of Applied and System Software, Voronezh State University. E-mail: sd@expert.vrn.ru

A.N. Shmarin - Post-Graduate Student, Voronezh State University. E-mail: tim-shr@mail.ru S.D. Makhortov - Dr. Sc. (Phys.-Math.), Associate Professor, Head of Department, Voronezh State University (VSU). E-mail: sd@expert.vrn.ru

S.Yu. Bolotova - Ph. D. (Phys.-Math.), Lecturer University, Voronezh State University (VSU). E-mail: bolotova.svetlana@gmail.com