00589naa#a2200169#i#450# EN\INFRA-M\bibl\41664 20240704123009.4 2306-1731 20210421b2021####ek#y0engy0150####ca RU Digital Business Solutions and the Network Environment of the Smart City Infrastructure Journal article Moscow INFRA-M Academic Publishing LLC. 2021 7 с. Journal article local Статистика. Демография. Социология. 31 Levchaev Petr Aleksandrovich zh-szf.ru