1. Seed HB, Idriss IM. Moduli and damping factors for dynamic responses analysis. Report no. EERC 70-10, University of California, Berkeley; 1970.
2. Kramer SL. Geotechnical earthquake engineering. Upper Saddle River, NJ: Prentice-Hall; 1996.
3. NEES at the University of Texas. http://nees.utexas.edu/, 6 August 2008.
4. Basic response functions for elastic foundations;Veletsos;Journal of the Engineering Mechanics Division ASCE,1974
5. Verbic B. Analysis of certain structure-foundation interaction systems. PhD thesis, Rice University; 1972.