00457naa#a2200169#i#450# EN\INFRA-M\bibl\12449 20250218160754.2 2500-0527 20160525b2016####ek#y0engy0150####ca RUS RU Fundamentals of marketing Journal article Moscow INFRA-M Academic Publishing LLC. 2016 0 с. Journal article local Titova Elena Nikolaevna zh-szf.ru