1. N. G. Bakanova, G. A. Kalabin, and V. V. Podgorskii, “Relationship between the molecular structure and stimulating activity of humic substances obtained from lignin,” Ekol. Bezop. Zhiznedeyatel’nosti 2, 13–18 (2012).
2. E. N. Kozlova, A. L. Stepanov, and L. V. Lysak, “Application of bacterial-humus preparations in the remediation of soils contaminated with diesel fuel,” Eurasian Soil Sci. 45, 449–452 (2014).
3. E. N. Kozlova, A. L. Stepanov, and L. V. Lysak, The influence of bacterial-humus preparations on the biological activity of soils polluted with oil products and heavy metals, Eurasian Soil Sci. 48, 400–409 (2015).
4. Practical Manual on Soil Microbiology and Biochemistry (Moscow State Univ., Moscow, 1992) [in Russian].
5. M. A. Pukal’chik, M. I. Panova, V. A. Terekhova, O. S. Yakimenko, and E. V. Fedoseeva, “Effect of humic preparations on activity of soil enzymes in experimental conditions,” Agrokhimiya, No. 8, 94–101 (2017).