TY JOUR TI BRICS+ as a new type of global entity: multifaceted approach and categorization development KW BRICS+ KW classical BRICS theories KW economic and structural approaches KW institutional and legal approaches KW network and hybrid approaches KW value-identical and critical approaches JO Theoretical economics AU Gomulina, A.A. PY 2025 IS 0 PB Yaroslavl State Technical University