@article{Shapovalov2019,
author={Shapovalov, D.A. and Doncov, A.V. and Savinova, S.V. and Gamzatova, M.M.},
title={},
journal={MOSCOW ECONOMIC JOURNAL},
publisher={Electronic science},
year={2019},
pages={30-30},
volume={4},
issue={3},
}