• Kopylova J. G. Geochemistry of mercury in waters of the West Siberia south-east / J. G. Kopylova, R. F. Zarubina, L. F. Frizen // Fundamental and applied problems of environmental protection. Vol. 4 : International conference, September, 12-16, 1995, Tomsk : abstracts. Tomsk, 1995. Vol. 4 : Contemporary problems of geoecology and rational use of natural resources ; Ecological aspects of urban design and agrilandscape formation. Recreational use of nature. P. 31-32