Kargapolova E.V., Dulina N.V., Shkurin D.V. The transformation of the socio-ecological system of a region (case study of the Volga Region). Territorial development issues, 2019, no. 2 (47). URL: http://vtr.isert-ran.ru/article/28127?_lang=en DOI: 10.15838/tdi.2019.2.47.1