00600naa#a2200181#i#450# EN\\bibl\4952 /en/manage/index 20241204034639.3 1999-5644 20150310b2015####ek#y0engy0150####ca RUS RU The problem of «sustainable tourism» in science and education in Russia and abroad: a comparative analysis Journal article CHERKIZOVO Russian State University of Tourism and Service 2015 11 с. Journal article local Ilkevich Sergey test.editorum.ru /en/manage/index