@article{Guzakova2020determining,
author={Guzakova, O.L. and Tulina, T.M.},
title={Determining the Size of the Middle Class in Russia Based on a Set of Criteria "Level of Education – Professional Status»},
journal={Scientific Research and Development. Economics},
publisher={INFRA-M Academic Publishing LLC.},
year={2020},
pages={35-41},
volume={8},
issue={6},
}