1. Afonin, A.N, Green, S.L, Dzyubenko, N.I, Frolov, A.N., 2008. Agroecological atlas of Russia and neighboring countries: economically significant plants, their pests, diseases and weeds. http://www.agroatlas.ru.
2. Soil Atlas of Europe;Akça,2005
3. Soil erosion and land use policy in Iceland in relation to sheep grazing and government subsidies;Arnalds;Environ. Sci. Policy,2003
4. Bazhenova, O.I., Lyubtsova, E.M., Ryzhov, Yu.V., Makarov, S.A., 1997. Space-time analysis of the dynamics of erosion processes in the south of Eastern Siberia. Science, RAS, St. Petersburg.
5. The fate of eroded soil: sediment sinks and sediment budgets of agrarian landscapes in Southern Minnesota, 1851–1988;Beach;Ann. Assoc. Am. Geogr.,1994