1. J. Geertsma and D. C. Smith “Some aspects of elastic wave propagation in fluid-saturated porous solids,” Geoph.,26, No. 2 (1961).
2. O. K. Kondrat'ev and A. G. Gamburtsev, Seismic Investigations in the Coastal Region of Eastern Antarctica [in Russian], Izd. AN SSSR, Moscow (1963).
3. G. N. Pariiskaya, “Determination of average velocity,” Trudy Geofiz. Instituta AN SSSR, No. 33 (162) (1956).
4. M. Wyllie, A. Gregory, and J. Gardner, “Elastic wave velocities in heterogeneous and porous media,” Geoph.,21, 1 (1956).
5. A. I. Savich, V. I. Koptev, V. N. Nikitin, and Z. G. Yashchenko, Seismoacoustic Methods of Studying Rock Masses [in Russian], Nedra, Moscow (1969).