TY JOUR TI Russia's role in the emerging multipolar financial system: challenges and opportunities KW Russia KW international financial system KW multipolarity KW digital ruble KW SPFS KW BRICS KW EAEU KW de-dollarization KW geoeconomics KW sanctions KW currency sovereignty JO JOURNAL OF MONETARY ECONOMICS AND MANAGEMENT AU Loktionov, Z.I. PY 2025 IS 0 PB ITBO University