Ibragimov, Sh. Z.
Kuzina, D. M.
Nugmanov, I. I.
Article History
Received: 29 July 2019
Revised: 30 December 2019
Accepted: 27 January 2020
First Online: 7 October 2020
FINANCING
: The study was financed by a subsidy allocated as part of the state support to Kazan (Volga Region) Federal University in order to improve its competitiveness among the world’s leading research and educational centers.