00472naa#a2200169#i#450# EN\INFRA-M\bibl\1528 20240810175012.6 1998-0728 20140217b2014####ek#y0engy0150####ca RUS RU Electronic Textbook: Pros and Cons Journal article Moscow INFRA-M Academic Publishing LLC. 2014 3 с. Journal article local Vinogradova Natalya Fedorovna naukaru.ru