Kosobutskaya A.Y., Polshkov  Y. N., Soltis  K. SOCIO-ECOLOGICAL-ECONOMIC DEVELOPMENT OF OLD INDUSTRIAL REGIONS — SUSTAINABILITY PROFILE // Region: Systems, Economics, Management. 2023. Vol. 1, no. 4 (63). P. 47–55. https://doi.org/10.22394/1997-4469-2023-63-4-47-55