00519naa#a2200169#i#450# EN\\bibl\101859 20250830150959.6 2588-0209 20201225b2020####ek#y0engy0150####ca RU FORMATION OF A REGIONAL CLUSTER TO ENSURE SUSTAINABLE DEVELOPMENT OF THE SOCIAL, ENVIRONMENTAL AND ECONOMIC SYSTEM OF THE PENZA REGION Journal article Moscow Electronic science 2020 0 с. Journal article local mshj.ru