00539naa#a2200157#i#450# EN\\bibl\104391 20260319104841.4 2221-3260 20250717b2025####ek#y0engy0150####ca RU Differentiation of regions by the level of socio-economic development in the system of economic security indicators Journal article Yaroslavl Yaroslavl State Technical University 2025 20 с. Journal article local Elkin Stanislav Evgenevich ystu.editorum.ru