00552naa#a2200169#i#450# EN\\bibl\6332 20240518193542.6 1995-042X 20150722b2015####ek#y0engy0150####ca RUS RU Tendencies of development of the concept of service management: analysis of foreign researches Journal article CHERKIZOVO Russian State University of Tourism and Service 2015 0 с. Journal article local Ilkevich Sergey service-rusjournal.editorum.ru