1. Developments in Geotechnical Engineering;JN Brune,1976
2. Butcher, G., Hopkins, D., Jury, R., Massey, W., McKay, G., and McVerr, G., The September 1985 Mexico earthquakes: Final Report of the New Zealand Reconnaissance Team, Bull. N. Z. Soc. Earthquake Eng., 1988, vol. 21, no. 1.
3. Jeffreys, H., and Swirles, B., Methods of Mathematical Physics, Cambridge: Cambridge Univ., 1950, 2nd ed.
4. Developments in Geotechnical Engineering;L Esteva,1976
5. Developments in Geotechnical Engineering;E Faccioli,1976