LDR 00540naa#a2200169#i#450# 001 EN\\bibl\43484 005 20211203185755.5 011 ## _a2072-9502 100 ## _a20210415b2021####ek#y0engy0150####ca 102 ## _aRU 200 1# _aPRINCIPLES OF FORMAL CLASSIFICATION THEORY OF TECHNICAL SYSTEMS: CASE OF ENERGY FACILITIES _eArticle 210 1# _aAstrakhan _cAstrakhan State Technical University _d2021 215 ## _a12 с. 608 ## _aArticle _2local 675 ## _aМатематика. 51 _z 700 #1 _aFedorova _gNatalia Vasilyevna 856 4# _avestnik.astu.org _u