00490naa#a2200169#i#450# EN\\bibl\6009 20241203123137.2 1999-9836 20150617b2015####ek#y0engy0150####ca RUS RU Regional Aspects of Profitability of Human Capital in Russia Journal article Moscow All-Russian center of living standards 2015 6 с. Journal article local Ovsyannikov Aleksandr naukaru.ru