1. Abriola , L. M. Finite element solution of the unsaturated flow equation using hierarchic basis functions Proceedings of the 6th International Conference on Finite Elements in Water sources A. Sá Costa A. Melo Baptista W. G. Gray C. A. Brebbia G. F. Pinder 125 133 New York 1986
2. Constant rate rainfall infiltration: A versatile nonlinear model, 1, Analytical solution;Broadbridge;Water Resour. Res.,1988
3. Brooks , R. H. A. T. Corey Hydraulic properties of porous media, Hydrol. Pap 3 Colo. State Univ. Fort Collins 1964
4. Developing joint probability distributions of soil water retention characteristics;Carsel;Water Resour. Res.,1988