1. Soil Atlas of the Komi Republic, Ed. by G. V. Dobrovol’skii, A. I. Taskaev, and I. V. Zaboeva (Komi Resp. Tipogr., Syktyvkar, 2010) [in Russian].
2. N. A. Artemkina, T. T. Gorbacheva, and N. V. Lukina, “Low-molecular-weight organic acids in soil water of air-polluted forests in the Kola Peninsula,” Lesovedenie, No. 4, 21–29 (2011).
3. I. B. Archegova, “Characterization of pedogenetic processes in some landscapes of Vorkuta tundra,” in The Materials on Soils of Komi ASSR (Syktyvkar, 1972), pp. 38–46.
4. P. I. Bel’kevich, L. M. Rogach, and T. V. Sokolova, “Sorption properties of granulated peat,” Khim. Tverd. Topl., No. 5, 97–101 (1984).
5. S. V. Belyaev, I. V. Zaboeva, V. A. Popov, and T. A. Stenina, Soil conditions of Inta industrial district (according to research work of 1956–1957), The Scientific Archive of Komi Scientific Center, Ural Branch, Russian Academy of Science (NA KNTs UrO RAN), Fund 1, Inventory 7, File264.