1. Grishina, L.A., Gumusoobrazovanie i gumusnoe sostoyanie pochv (Humus Formation and Humic State for Soils), Moscow, 1986.
2. Drugov, Yu.S. and Rodin, A.A., Monitoring organicheskikh zagryaznenii prirodnoi sredy 500 metodik: prakticheskoe rukovodstvo (Monitoring of Organic Pollution of Natural Environment. 500 Methods. Handbook), Moscow, 2009.
3. Zolotareva, B.N. and Ruzieva, R.Kh., Physiologically active phenols and indoles in gray forest soil upon regular application of organic fertilizers, Eurasian Soil Sci., 2000, vol. 33, no. 4, pp. 376–381.
4. Kovaleva, N.O. and Kovalev, I.V., Transformation of lignin in surface and buried soils of mountainous landscapes, Eurasian Soil Sci., 2009, vol. 42, no. 11, pp. 1270–1282.
5. Kononova, M.M. and Aleksandrova, I.I., Soils phenolic compounds and their role in humus formation, Materialy I Vsesoyuznogo simpoziuma “Fenol’nye soedineniya i ikh biologicheskie funktsii” (Proc. I All-Union Symp. “Phenolic Compounds and Their Biological Functions”), Moscow, 1968.