00657naa#a2200181#i#4500001001500000003001700015005001700032011001400049100004100063102000700104200009800111210007000209215001000279608002700289686008900316700003100405856003900436EN\\bibl\16048/en/manage/index20250531043135.6##a1993-7768##a20170620b2017####ek#y0engy0150####ca##aRU1#aSTUDY OF IRRATIONAL SYSTEMS BY EXTENDING  THE LOGICAL-MATHEMATICAL APPARATUSeJournal article1#aCHERKIZOVOcRussian State University of Tourism and Serviced2017##a8 с.##aJournal article2local##aТуристско-экскурсионное обслуживание. 71.372grnti#1aKortunovgVadim Vadimovich4#atest.editorum.ruu/en/manage/index