1. Designation D 1557, Standard test method for laboratory compaction characteristics of soil using modified effort,2002
2. Designation D 2325, Standard test method for capillary-moisture relationships for coarse- and medium-textured soils by porous-plate apparatus,2002
3. Designation D 4767, Standard test method for consolidated undrained triaxial compression test for cohesive soils,2002
4. The principle of effective stress;Bishop;Technisk Ukeblad,1959
5. The experimental of partly saturated soil in the triaxial apparatus;Bishop,1961