For citations:
, . Vestnik of the Plekhanov Russian University of Economics. 2017;(5):198-201. (In Russ.) https://doi.org/10.21686/2413-2829-2017-5-198-201
, . Vestnik of the Plekhanov Russian University of Economics. 2017;(5):198-201. (In Russ.) https://doi.org/10.21686/2413-2829-2017-5-198-201