00521naa#a2200169#i#450# EN\INFRA-M\bibl\46151 20241006052748.7 2306-627X 20211018b2021####ek#y0engy0150####ca RU Classification of Retail Chain services Journal article Moscow INFRA-M Academic Publishing LLC. 2021 5 с. Journal article local Экономика. Экономические науки. 33 Valeeva Yu. S. naukaru.ru