1. Russian Chernozem;Dokychaev,1883
2. Geography of Soils with Foundations of Soil Science;Gennadiev,2005
3. History of Russian Pedology;Ivanov,2003
4. Kamennaya Steppe: Agroforestry Landscapes;Mil’kov,1992
5. State protective windbreaks as a part of the protective forest plantations;Erusalimskii,2009