For citations:
Valamat-Zade A.R., Girich M.G., Levashenko A.D. Adverts and Spam in E-Commerce: Improving Confidence. Vestnik of the Plekhanov Russian University of Economics. 2019;(6):149-156. (In Russ.) https://doi.org/10.21686/2413-2829-2019-6-149-156