1. Studies on the movement of soil moisture;Buckingham;USDA Bur. Soils Bull.,1907
2. Solution of the flow equation for drying of soils and other porous media;Gardner,1959
3. Unsteady flow of gas through semi-infinite porous media;Kidder;J. Appl. Mech.,1957
4. Concept of diffusion applied to soil water;Philip,1954
5. Theory of infiltration;Philip,1969