1. A. V. Bryzzhev, D. I. Rukhovich, P. V. Koroleva, N. V. Kalinina, E. V. Vil’chevskaya, E. A. Dolinina, and S. V. Rukhovich, “Organization of retrospective monitoring of the soil cover in Azov district of Rostov oblast,” Eurasian Soil Sci. 48 (10), 1029–1049 (2015).
2. State Soil Map of the Soviet Union, Scale 1: 1000000, Sheet 37: Moscow, Ed. by L. I. Pasolov (General Office of Geodesy and Cartography, Moscow, 1955) [in Russian].
3. M. Dubinin, Vegetation indices, GIS-Lab, 2006. http://gis-lab.info/qa/vi.html.
4. Classification and Diagnostics of Soils in Soviet Union (Kolos, 1977) [in Russian].
5. L. L. Shishov, V. D. Tonkonogov, I. I. Lebedeva, and M. I. Gerasimova, Classification and Diagnostic System of Russian Soils (Oikumena, Smolensk, 2004) [in Russian].