1. I. L. Nersesov, A. N. Semionov andI. G. Simbireva,Space time distribution of ratios of travel times of transverse and longitudinal waves in Garm region, Exp. Seismology (1971), Sbornik, 334.
2. O. M. Barsukov,Relationship between the electrical resistivity of rocks and tectonic processes, Izv. Earth Physics No. 1 (1970), 84.
3. V. I. Ulomov andB. Z. Malashev,O predvestike silnogo tecktonicheskogo zemletria senia, Doke. A.N. SSSR,176 No. 2 (1967).
4. Y. P. Aggarwal, L. R. Sykes, J. Armbruster andM. L. Sbar,Premonitory changes in seismic velocity and earthquake prediction, Nature241 (1973), 101.
5. J. H. Whitcomb, J. D. Garmany andD. L. Anderson,Earthquake prediction: Variation of seismic velocities before the San Fernando earthquake, Science180 (1973), 632.