1. Bolt, B. A. (1988). Earthquakes. W. H. Freeman, New York, 282 p.
2. Bolt, B. A. (1993). Earthquakes and Geological Discovery. Scientific American Library, New York, 229p.
3. Preliminary reference Earth model
4. A FORTRAN 77 program to compute seismic rays traveling inside a radially inhomogeneous Earth
5. Lillie, R.J. (1999). Whole Earth Geophysics: An Introductory Textbook for Geologists and Geophysicists, Englewood Cliffs, N.J., Prentice Hall, Inc., 361 p.