1. L. S. Chernova, “Methods for the Analysis and Regulation of Proportions of Regional Development,” Ekonomist, No. 7 (2009).
2. Russian Statistical Yearbook (Rosstat, Moscow, 2011) [in Russian].
3. L. S. Chernova, “Some Issues of the Regional Structure of the Russian Federation,” Reg. ekon. 36, 267 (2012).
4. Land Resources of the World. http://www.land-in.ru
5. Russian Statistical Yearbook (Rosstat, Moscow, 2010) [in Russian].