00479naa#a2200169#i#450# EN\INFRA-M\bibl\13027 20240630180554.7 2500-0500 20160703b2016####ek#y0engy0150####ca RUS RU The social insurance system in the Russian population Journal article Moscow INFRA-M Academic Publishing LLC. 2016 0 с. Journal article local Gaysina Kristina zh-szf.ru