TY JOUR TI THE ROLE OF ESG RATINGS IN THE FORMATION OF SUSTAINABLE PORTFOLIOS OF INVESTORS KW ESG KW ESG rating KW sustainable investment KW investment portfolio KW rating agencies KW non-financial reporting KW risks KW corporate sustainability KW ESG metrics KW long-term value JO Russian Journal of Management AU Mottaeva, A.B. PY 2026 IS 13 PB Publishing Center RIOR