1. N. D. Anan’eva, Microbiological Aspects of the Self-Purification and Resilience of Soils (Nauka, Moscow, 2003) [in Russian].
2. E. V. Arinushkina, Manual on the Chemical Analyses of Soils (Izd. Mosk. Gos. Univ., Moscow, 1970) [in Russian].
3. E. V. Blagodatskaya, T. V. Pampura, I. N. Bogomolova, G. N. Koptsik, and N. V. Lukina, “The Impact of Emissions from the Copper-Aluminum Smelter on the Soil Microbial Communities in Forest Biogeocenoses of the Kola Peninsula,” Izv. Ross. Akad. Nauk, Ser. Biol., No. 2, 232–242 (2008).
4. V. D. Vasil’evskaya, Soil Formation in Tundras of Central Siberia (Nauka, Moscow, 1980) [in Russian].
5. GOST (State Standard) 26213-91, Soils. Methods of Determination of the Organic Matter Content [in Russian].