1. Sochava, V.B.: Principles of physical and geographical regionalization. In: Questions of Geography. Collection of articles for the 18th Internships Geography Congress, pp. 356–366. Moscow-Leningrad (1956)
2. Isachenko, A.G.: Basic principles of physical and geographical regionalization and issues of constructing a taxonomic system of units. Uchenye zapiski Leningradskogo gosudarstvennogo universiteta im. A.A. Zhdanova. Ser. Geograph. Sci. 8(317), 21–53 (1962)
3. Isachenko, A.G.: Theory and Methodology of Geographical Science. Publishing Center Academy, Moscow (2004)
4. Gvozdetsky, N.A., Zhuchkova, V.K., Zvonkova, T.V.: Physical and Geographical Regionalization of the USSR: Characteristics of Regional Units. Publishing House of Moscow University (1968)
5. Mikhailov, N.I.: Physical and Geographical Regionalization. Publishing House of Moscow University (1985)