D.I. Surzhik1, A.O. Kovalenko2, A.A. Bykov3, O.R. Kuzichkin4, A.V. Koskin5

1 Vladimir state university (Vladimir, Russia)

1,2,4 Belgorod State University (Belgorod, Russia)

3 Financial University under the Government of the Russian Federation (Moscow, Russia)

5 Turgenev OSU (Orel, Russia)

1 arzerum@mail.ru, 2 Alexei.Kovalenko55555@yandex.ru, 3 bykov_a_a@list.ru, 4 Kuzichkin@bsu.edu.ru, 5koskin@oreluniver.ru