00554naa#a2200169#i#450# EN\INFRA-M\bibl\39452 20240505102500.7 2306-627X 20201007b2020####ek#y0engy0150####ca RU Designing Complex Systems: Key Research Methods and Questions Journal article Moscow INFRA-M Academic Publishing LLC. 2020 7 с. Journal article local Экономика. Экономические науки. 33 Zvyagin Leonid Sergeevich naukaru.ru