1. D.L. Turcotte, Fractals and Chaos in Geology and Geophysics, Cambridge University Press, Cambridge, 1992.
2. B. Gutenberg, C.F. Richter, Seismicity of the Earth and Associated Phenomena, 2nd ed., Princeton University Press, Princeton, NJ, 1954.
3. Relation between the earthquake statistics and fault patterns, and fractals and percolation