00474naa#a2200169#i#450# EN\INFRA-M\bibl\9372 20240507035238.2 1998-0701 20151117b2015####ek#y0engy0150####ca RUS RU Method activation end date in the past. direction:re Journal article Moscow INFRA-M Academic Publishing LLC. 2015 11 с. Journal article local Bulyga R. P. naukaru.ru