1. G. M. Petrashen', A. M. Epitnat'eva, and G. M. Goloshubin, "Development of the physical basis of seismic methods of investigation," Fiz. Zemli, No. 8 (1990).
2. M. A. Sadovskii, "Natural lumpiness of rocks," Dokl. Akad. Nauk,247, No. 4 (1979).
3. M. A. Sadovskii, V. F. Pisarenko, and V. V. Shteinberg, "Dependence of an earthquake on the volume of the seismic focus," Dokl. Akad. Nauk,271, No. 3 (1983).
4. V. N. Rodionov, I. A. Sizov, and V. M. Tsvetkov, Principles of Geomechanics [in Russian], Nedra, Moscow (1986).
5. V. N. Oparin and M. V. Kurlenya, "Gutenberg velocity section and its possible geomechanical explanation. I. Zonal disintegration and hierarchical series of geoblocks," Fiz.-Tekh. Probl. Razrab. Polezn. Iskop., No. 2 (1994).