A.V. Sokolovskiy – Research Scientist, Siberian Federal University (Krasnoyarsk)

E-mail: sokolovskii_a@mail.ru

I.V. Tyapkin – Teacher of Faculty, Siberian Federal University (Krasnoyarsk)

E-mail: Aronakss@yandex.ru

E.A. Veisov – Professor, Siberian Federal University (Krasnoyarsk)

E-mail: eveisov@sfu-kras.ru