1. A natural compression law for soils (an Advance on e–logep′);Butterfield;Géotechnique,1979
2. Vibration modulus of normally consolidated clay;Hardin;Proc. ASCE,1968
3. The use of a variable shear modulus in elastic-plastic models for clays;Houlsby;Computers and Geotechnics,1985
4. The measurement of soil stiffness in the triaxial apparatus;Jardine;Géotechnique,1984
5. Consolidated-undrained direct simple shear tests on saturated clays;Ladd,1972