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2. V. P. Bondarev, Engineering Geodynamics of Ravine-Balka Systems. Review Information (Geoinformmark, Moscow, 1998) [in Russian].
3. M. I. Budyko, Climate and Life (Gidrometeoizdat, Leningrad, 1971) [in Russian].
4. G. P. Butakov, “Dynamics of ravine and river erosion at the end of the 20th century in the Republic of Tatarstan,” in Modern and Ancient Erosional Processes (Kazan, 2001), pp. 51–67 [in Russian].
5. Geography of Ravine Erosion, Ed. by E. F. Zorina (Mosk. Univ., Moscow, 2006) [in Russian].