1. Some basic aspects of soil liquefaction during earthquakes;Dobry;Earthquake Hazards and the Design of Constructed Facilities in the Eastern United States, Annals of the New York Academy of Science,1989
2. Research on determining the density of sand by spoon penetration test;Gibbs,1957
3. Elastic wave velocities in granular soils;Hardin;Journal of ASCE,1963
4. Stability of natural deposits during earthquakes;Ishihara,1985
5. Multi-directional irregular loading tests on sand;Ishihara;Soil Dynamics and Earthquake Engineering,1988