00539naa#a2200169#i#450# EN\\bibl\10492 20240511121720.6 1995-042X 20150316b2015####ek#y0engy0150####ca RUS RU Customer-oriented approach as a key effectiveness driver of tourism enterprises Journal article CHERKIZOVO Russian State University of Tourism and Service 2015 10 с. Journal article local Konovalova Elena service-rusjournal.editorum.ru