00554naa#a2200169#i#450# EN\\bibl\4952 20240510043928.5 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 rguts.editorum.ru