1. Cho, G.C. (2001). “Unsaturated soil stiffness and post-liquefaction shear strength.” Ph.D. Thesis, Georgia Institute of Technology, p. 288.
2. Cho, G.C. and Santamarina, J.C. (2001). “Unsaturated particulate materials—Particle-level study.”Journal of Geotechnical and Geoenvironmental Engineering, ASCE, Vol. 127, No. 1, pp. 84–96.
3. Cho, G.C. (2003a). “Determination of critical state parameters in sandy soils from standard triaxial testing (I): review and application.”Journal of the Korean Geotechnical Society, Vol. 19, No. 1, pp. 61–75.
4. Cho, G.C. (2003b). “Determination of critical state parameters in sandy soils from standard triaxial testing (II): experiment and recommendation.”Journal of the Korean Geotechnical Society, Vol. 19, No. 1, pp. 77–92.
5. Cho, G.C., Lee, J.S., and Santamarina, J.C. (2003). “Spatial variability in soils: high resolution assessment with electrical needle probe.”Journal of Geotechnical and Geoenvironmental Engineering, ASCE, accepted.