1. Brooks , R. H. A. T. Corey Hydraulic properties of porous media,Hydrol. Pap. 3 Colo. State Univ. Fort Collins 1964
2. Campbell , G. S. S. Shiozawa Prediction of hydraulic properties of soils using particle-size distribution and bulk density data International Workshop on Indirect Methods for Estimating the Hydraulic Properties of Unsaturated Soils M. T. van Genuchten R. J. Leij L. J. Lund 317 328 Riverside 1992
3. Hydraulic conductivity estimation for soils with heterogeneous pore structure;Durner;Water Resour. Res.,1994
4. Gupta , S. K. K. K. Tanji D. R. Nielsen J. W. Biggar C. S. Simmons J. L. Maclntyre Field simulation of soil-water movement with crop water extraction,Dep. of Land, Air and Water Resour., Water Sci. Eng. Pap. 4013 Univ. of Calif. Davis 1978