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3. A. A. Aleinikov, A. V. Tyurin, L. V. Simakin, A. S. Efimenko, and A. A. Laznikov, “The history of fires in the dark coniferous forests of the Pechoro-Ilychsky Reserve from the second half of the 19th century to the present,” Sib. Lesn. Zh., No. 6, 31–42 (2015). https://doi.org/10.15372/SJFS20150603
4. O. A. Alekin, Fundamentals of Hydrochemistry (Leningrad, 1953) [in Russian].
5. L. N. Aleksandrova, Soil Organic Matter and the Processes of Its Transformation (Leningrad, 1980) [in Russian].