1. About permeability of subsurface soils in case of incomplete saturation;Averjanov,1950
2. Hydraulic Properties of Porous Medium;Brooks,1964
3. Relative Permeability Calculations from Pore-Size Distribution Data;Burdine,1953
4. Pore Pressures and Volume Changes in Unsaturated Soils;Campbell,1973
5. The permeability of porous materials;Chids;Proc. R. Soc. Lond. Ser. London, Math. Phys. Sci.,1950