1. Aggarwal, Y. P., Sykes, L. R., Armbruster, J. and Sbar, M. L. (1973), Premonitory changes in seismic velocities and prediction of earthquakes, Nature 241, 5385.
2. Brady, B. T. (1974), Seismic precursors before rock failures in mines, Nature 252, 5484.
3. Brady, B. T. (1966), Theory of earthquakes, IV. General implications for earthquake prediction, Pure appl. Geophys. (in press).
4. Brady, B. T. (1977), An investigation of the scale invariant properties of failure, Int. J. Rock Mech. Mining Sci. (in press).
5. Nersesov, I. L., Lukk, A. A., Ponomarev, V. S., Rautain, T. G., Rulev, B. G., Semenov, A. N. and Simbrieva, I. G., Possibilities of Earthquake Prediction Exemplified by the Garm Area of the Tadzhik, S.S.R., in Earthquake Precursors (ed. M. A. Sadovskii, I. L. Nersesov and L. G. Latynina) (U.S.S.R. Academy of Sciences, Moscow 1975), pp. 79–99.