00561naa#a2200181#i#450# EN\INFRA-M\bibl\46150 20260223225430.1 2306-627X 20211018b2021####ek#y0engy0150####ca RU Digital Transformation of the Service Sector Journal article Moscow INFRA-M Academic Publishing LLC. 2021 13 с. Journal article local Экономика. Экономические науки. 33 Shevchenko D. A. Mihaylov V. V. naukaru.ru