1. Jeffreys, H., Earthquakes and Mountains (Methuen, London, 1935).
2. Gutenberg, B., and Richter, C. F., Seismicity of the Earth (Princeton University, 1949).
3. Atanasiu, I. (edit. Acad. R. P. R., Bucharest, 1959).
4. McKenzie, D. P., and Parker, R. L., Nature, 216, 1276 (1967).
5. Morgan, W. J., J. Geophys. Res., 73, 1959 (1968).