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2. Z. S. Artemy’eva, Organic Matter and Granulometric System of Soil (GEOS, Moscow, 2010) [in Russian].
3. Stratigraphy of Quaternary deposits and glaciation of Tuva;B. A. Borisov,1997
4. V. I. Volkovintser, “Pedogenesis in steppe depressions of the Southern Siberia,” Pochvovedenie, No. 8, 3–11 (1969).
5. V. I. Volkovintser, “Humification in steppe soils of ultracontinental regions of Siberia,” in Humus and Its Role in Pedogenesis and Fertility of Soils (Leningrad, 1973), pp. 39–40 [in Russian]