[1] Aki, K., Richards, P. G.: Quantitative Seismology. San Francisco, W. H. Freeman and Co. 1980.

[2] Bolt, B. A.: Inside the Earth. San Francisco, W. H. Freeman and Co. 1982.

[3] Dziewonski, A. M., Anderson, D. L.: Preliminary Reference Earth Model. Phys. Earth Planet. Inter. 25 (1981), 297.

[4] Fowler, C. M. R.: The Solid Earth. Cambridge University Press 1990.

[5] Jacobs, J. A.: A Textbook on Geonomy. London, Adam Hilger 1974.