00605naa#a2200181#i#450# EN\INFRA-M\bibl\38855 20240516143533.4 2500-0497 20200825b2020####ek#y0engy0150####ca RU About the Origin of the variangians Shimon and Yakun, serving Yaroslav the Wise Journal article Moscow INFRA-M Academic Publishing LLC. 2020 2 с. Journal article local Всеобщая история. 94 История России. 03.23 grnti Fedchenko Oleg Dmitrievich naukaru.ru