1. Modelling of soil mechanical properties to soil moisture conditions;Ali-Hassan,1983
2. Strength-density relations of an air-dry sand;Anonymous;Waterways Experimental Station, Tech. Report No. 3-652,1964
3. Effects of density, moisture content and soil type on cone index;Ayers,1980
4. The effect of drying on soil strength parameters;Camp,1969
5. The soil sheargraph;Cohron,1962