00578naa#a2200193#i#450# EN\RIOR\bibl\6298 /en/manage/index 20250904024158.4 2500-1469 20150430b2015####ek#y0engy0150####ca RUS RU Design of the structure of regional energy system based on data envelopment model Journal article Moscow Publishing Center RIOR 2015 7 с. Journal article local Ratnyer Svyetlana Ratner Pavel fht.editorum.ru /en/manage/index