1. Consolidation of compacted and unsaturated clays;Barden;Geotechnique,1965
2. Bishop , A. W. The principle of effective stress 1 5 Oslo, Norway 1960
3. Some aspects of effective stress in saturated and partly saturated soils;Bishop;Geotechnique,1963
4. The experimental study of partly saturated soils in the triaxial apparatus;Bishop;Proc. Int. Conf. Soil Mech. Found. Eng. 5th,1961
5. Braester , C. G. Dagan S. P. Neuman D. Zaslavski A survey of equations and solutions of unsaturated flow in porous media Haifa 1972