00589naa#a2200169#i#450# EN\INFRA-M\bibl\42784 20241129221314.5 2306-627X 20210408b2021####ek#y0engy0150####ca RU Applied System Analysis in Management As a Tool for Modeling the Functioning of Economic Systems Journal article Moscow INFRA-M Academic Publishing LLC. 2021 7 с. Journal article local Экономика. Экономические науки. 33 Zvyagin Leonid Sergeevich naukaru.ru