1. Akopyan, S. T., 1996, Entropy of seismic systems and a new seismic law: Trans. (Doklady) USSR Acad. Sci., Earth Sci. Sect., v. 344, no. 4, p. 1–7 (Trans. 1995, Doklady Rossiyskoy Akad. Nauk SSSR, v. 340, no. 4, p. 531–535).
2. Bak, P., and Tang, C., 1989, Earthquakes as a self-organized critical phenomenon: J. Geophys. Res., v. 94, no. B11, p. 15635–15637.
3. Chiba, T., and Nagahama, H., 2001, Curie symmetry principle in nonlinear functional systems: Forma, v. 16, no. 3, p. 225–231.
4. Curie, P., 1894, Sur la symérie dans les phénomènes physiques, symérie d’un champ électrique et d’un champ magnetique: J. Phys. (Paris), v. 3, p. 393–415.
5. Enya, O., 1901, Note on after-shocks of earthquakes: Rep. Imperial Earthquake Invest. Com., v. 35, p. 35–56 (in Japanese).