G.D. Scryabin1, P.E. Ryabov2, M.A. Borisov3

1 Moscow State University named after M.V. Lomonosov (Moscow, Russia)

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

3 VUC Moscow State University named after M.V. Lomonosov (Moscow, Russia)

1 skryabin.gleb.edu@gmail.com, 2 peryabov@fa.ru, 3 u567ku78@gmail.com