Soldatova, E. A., and D. V. Purgina. “Behavior and Transformation of Nitrogen Compounds in the Soil-Ground Water System Within the Agricultural Landscapes of Western Siberia”. Proceedings of Voronezh State University. Series: Geography. Geoecology, no. 4, Nov. 2020, pp. 32-43, doi:10.17308/geo.2020.4/3063.