00566naa#a2200169#i#450# EN\\bibl\44267 20221005150233.3 2658-4026 20210701b2021####ek#y0engy0150####ca RU Education marketing and the problem of educational services: a review of domestic and foreign studies Journal article Bryansk Bryansk State Technical University 2021 17 с. Journal article local Математика. 51 ARPENTYEVA MARIYAM RAVILYEVNA bstu.editorum.ru