00502naa#a2200169#i#450# EN\\bibl\2177 20250203123246.1 1993-7768 20140603b2014####ek#y0engy0150####ca RUS RU Rusologia as a complex scientific study of Early Rus Journal article CHERKIZOVO Russian State University of Tourism and Service 2014 8 с. Journal article local Chudinov Valeriy philosoph.editorum.ru