P.K. Korneev - Ph.D. (Phys.-Math.), Associate Professor, Department of Applied Mathematics and Mathematical Modeling, Institute of Mathematics and Natural Sciences, North-Caucasus Federal University, Stavropol, Russia
I.A. Zhuravlyova - Ph.D. (Ped.), Associate Professor, Department of Applied Mathematics and Mathematical Modeling, Institute of Mathematics and Natural Sciences, North-Caucasus Federal University, Stavropol, Russia. E-mail: irinapolina@yandex.ru
A.M. Kravtsov - Ph.D. (Phys.-Math.), Associate Professor, Department of Applied Mathematics and Computer Technology, Institute of Information Technology and Telecommunications, North-Caucasus Federal University, Stavropol, Russia
E.V. Nepretimova - Ph.D. (Phys.-Math.), Associate Professor, Department of Applied Mathematics and Mathematical Modeling, Institute of Mathematics and Natural Sciences, North-Caucasus Federal University, Stavropol, Russia. E-mail: nev1973@mail.ru
A.V. Gladkov - Senior Lecturer, Department of Applied Mathematics and Mathematical Modeling, Institute of Mathematics and Natural Sciences, North-Caucasus Federal University, Stavropol, Russia. E-mail: gavandrew@mail.ru