1. A. I. Savich, V. I. Koptev, V. N. Nikitin, and Z. G. Yashchenko, Seismoacoustic Methods of Investigating Rock Masses [in Russian], Nedra, Moscow (1969).
2. H. Link, zum Verhaltnis Seismish und Statisch Ermittelter Elastisitatsmoduln von Fels, Felsmechanik und Ungeniergeol., Suppe IV (1968).
3. A. I. Savich, “Elastic properties of rock in a mass adjacent to mine excavations,” Izv. Akad. Nauk SSSR, Fiz. Zemli, No. 11 (1965).
4. “Evaluation of elastic modulus of dam foundation rock determined seismically in comparison to those arrived at statically,” International Congress on Large Dams, Edinburg (1964).
5. Investigation of Rock Pressure by Geophysical Methods [in Russian], Nauka, Moscow (1967).