00509naa#a2200169#i#450# EN\\bibl\1420 20241226112935.4 1999-5644 20140131b2014####ek#y0engy0150####ca RUS RU The Rationale for Distance Learning in the Russian Federation Journal article CHERKIZOVO Russian State University of Tourism and Service 2014 4 с. Journal article local Isaev Roman vestnik-rguts.editorum.ru