00509naa#a2200181#i#450# EN\\bibl\14013 20250117073211.5 1999-8775 20150331b2015####ek#y0engy0150####ca RUS RU Energy saving resources of the utilities of Bryansk Journal article Bryansk Bryansk State Technical University 2015 2 с. Journal article local Ozherelev Viktor Ozhereleva Mariya zh-szf.ru