1. Altshuler L. V., Krupnikov K. K., Ledenev B. N., Zhuchikhin V. I. &Brazhnik M. I.:Dinamic Compressibility and Equation of State of Iron under High Pressure. (J. Exptl. Teoret. Fiz., vol. 34, pp. 874–885; 1958. Soviet Physics JEPT, vol. 34 (7), pp. 606–614; 1958).
2. Birch F.:Elasticity and Constitution of the Earth's Interior (J. Geoph. Research, 57, pp. 227–286), 1952.
3. Bullen K. E.:An Introduction to the Theory of Seismology (Cambridge Univ. Press), 1947.
4. Bullen K. E.:On Densities and Compressibilities at Pressures up to Thirty Million Atmospheres (Mon. Not. Roy. Astr. Soc., Geoph. Suppl., 6, p. 6), 1952.
5. Dana, S. W.:The Partition of Energy Among Seismic Waves Reflected and Refracted at the Earth's Core (Bull. Seis. Soc. Amer., 34, p. 189), 1944.