O.V. Nepomnyashchiy1, M.M.I. Al-Saghir2, A.G. Khantimirov3, S.A. Kotov4

1–4 Siberian Federal University (Krasnoyarsk, Russia)

1 2955005@gmail.com, 2 mahamedali51@yahoo.com, 4 thiskotov@yandex.ru