1. Intermediate term prediction of occurrence times of strong earthquakes;Keilis-Borok;Nature,1988
2. Localization of intermediate term earthquake prediction;Kossobokov;Preprint,1990
3. Strategy of earthquake prediction;Molchan;Phys. Earth and Planet, Interiors,1990
4. Sykes , L. R. letter to Dr. Dallas Peck July 13, 1988, in Appendix F of the National Earthquake Prediction Evaluation Council, June 6-7 1988, Reston, Virginia U.S. Geological Survey 1989