00475naa#a2200169#i#450# EN\INFRA-M\bibl\5815 20250112124448.7 1998-1740 20150417b2015####ek#y0engy0150####ca RUS RU The Case-Study As a Method of Humanitarian Research Journal article Moscow INFRA-M Academic Publishing LLC. 2015 3 с. Journal article local Volkova Natalya zh-szf.ru