1. Bak, P and Chen, K. Fractal Dynamics of Earthquakes In: Barton, C. C. and Lapointe, P R., eds. Fractals in the Earth Sciences. New York: Plenum, 1994
2. Bak, P and Tang, C. Earthquakes as a Self-Organized Critical Phenomenon. Journal of Geophysical Research B94 (1989) 15635.
3. Burridge, R. and Knopoff, L. Bulletin of the Seismological Society of America 57 (1967) 341.
4. Carlson, J. M. and Langer, J. S. Physics of Earthquakes Generated by Fault Dynamics. Physical Review Letters 62 (1989) 2632; Physical Review A 40 (1989) 6470.
5. Chen, K., Bak, P, and Obukhov, S. P. Self-Organized Criticality in a Crack Propagation Model of Earthquakes. Physical Review A 43 (1990)625.