00603naa#a2200181#i#4500001001500000003001700015005001700032011001400049100004100063102000700104200011300111210005800224215001100282608002700293675002900320700003300349856003900382EN\\bibl\43484/en/manage/index20250203144548.1##a2072-9502##a20210415b2021####ek#y0engy0150####ca##aRU1#aPRINCIPLES OF FORMAL CLASSIFICATION THEORY  OF TECHNICAL SYSTEMS: CASE OF ENERGY FACILITIESeJournal article1#aAstrakhancAstrakhan State Technical Universityd2021##a12 с.##aJournal article2local##aМатематика. 51#1aFedorovagNatalia Vasilyevna4#atest.editorum.ruu/en/manage/index