1. E. E. Andronov, A. G. Pinaev, E. V. Pershina, and E. P. Chizhevskaya, DNA Isolation from Soil Samples: Methodological Recommendations (All-Russia Research Institute for Agricultural Microbiology, St. Petersburg, 2011) [in Russian].
2. Ye. S. Vasilenko, O. V. Kutovaya, A. K. Tkhakakhova, and A. S. Martynov “Changes in the intensity of soilbiological processes caused by different-sized aggregates of migrational-mycelial chernozems”, Byull. Pochv. Instit. im. V.V. okuchaeva 73, 70–81 (2014).
3. A. A. Voronin, N. A. Protasova, and N. S. Bespalova, “Dynamics of enzymatic activity of ordinary chernozem in open field stationers of Kamennaya Step field,” Vestn. Voronezh. Gos. Univ., Ser. Khim., Biol., Farm., No. 2, 122–127 (2006).
4. E. V. Dadenko, M. A. Myasnikova, K. Sh. Kazeev, S. I. Kolesnikov, and V. F. Val’kov, “Biological activity of ordinary chernozem during prolonged ploughing,” Pochvovedenie, No. 6, 724–733 (2014).
5. D. G. Zvyagintsev, “Biological activity of soils and scales of assessment of its parameters,” Pochvovedenie, No. 6, 48–54 (1978).