1. Orlov D.S. (1990) Humic Acids of the Soils and the General theory of Humification. Moscow State University Moscow. 324 pp.
2. Lishtvan I.I. and Abramec A.M. (1993) "Humic preparations and an environmental protection." Humic Substances in the Biosphere. Proceeding of the First International Conference in Moscow. Science [Publisher] 126-138
3. Shulgin A.I. Bobovnikova C.I. and Pleskachevskaya G.A. (2000) "Effective technology for detoxifying soil contaminated by polychlorinated bi-phenils with the use of humic acids." Polychlorinated Bi-phenils: Super-toxins of the 21 st Century; Information Bulletin No. 5 VINTIN [All Russia Research Institute of Science and Technical Information] 182-187.
4. Soil-Pesticide Relationships, Adsorption and Desorption of Organic Pesticides by Soil Colloids, with Implications Concerning Pesticide Bioactivity