TY JOUR TI THEORETICAL ASPECTS OF ASSESSING THE DEVELOPMENT OF A SYSTEM OF MEASURES FOR THE SUSTAINABLE DEVELOPMENT OF THE LOWER VOLGA BASIN KW lower Volga basin KW ecological situation KW natural resources KW finances KW socially adapted society JO MOSCOW ECONOMIC JOURNAL AU Bogomolova, L.Y. AU Taranova, I.V. PY 2025 IS 10 PB Electronic science