1. Biological Control of the Environment: Bioindication and Biotesting, Ed. by O. P. Melikhova and E. I. Egorova (Akademiya, Moscow, 2007) [in Russian].
2. M. V. Biryukov, “Bioluminescence Testing in the Study of Humic Acids,” in Proceedings of the IV International Conference “Humic Substances in the Biosphere,” St. Petersburg, Russia, 2007 (St. Petersburg, 2007), pp. 124–128 [in Russian].
3. A. D. Dashitsyrenova, G. A. Kalabin, and A. G. Proidakov, “Stimulation of the Bioconversion of Glucose to Ethanol by Humic Substances from Oxidized Brown Coals,” Khim. Interesah Ustoich. Razvit. 14(2), 199–204 (2006).
4. N. A. Kulikova, Doctoral Dissertation in Biology (Moscow, 2008) [in Russian].
5. I. I. Lishtvan and A. M. Abramets, “Humic Preparations Used as Fertilizers and Environmental Conservation,” in Humic Substances in the Biosphere (Nauka, Moscow, 1993), pp. 126–139 [in Russian].