LDR 00604naa#a2200169#i#450# 001 EN\\bibl\16048 005 20241211175706.3 011 ## _a1993-7768 100 ## _a20170620b2017####ek#y0engy0150####ca 102 ## _aRU 200 1# _aSTUDY OF IRRATIONAL SYSTEMS BY EXTENDING THE LOGICAL-MATHEMATICAL APPARATUS _eJournal article 210 1# _aCHERKIZOVO _cRussian State University of Tourism and Service _d2017 215 ## _a8 с. 608 ## _aJournal article _2local 686 ## _aТуристско-экскурсионное обслуживание. 71.37 _2grnti 700 #1 _aKortunov _gVadim Vadimovich 856 4# _anaukaru.ru _u