1. Barcelo , M. D. J. L. Nieber Simulation of natural soil pipes in a soil profile 1981
2. Barcelo , M. D. J. L. Nieber Influence of soil pipe networks on catchment hydrology 1982
3. Brooks , R. H. A. T. Corey Hydraulic properties of porous media, Hydraul. Pap. 3 Colo. State Univ. Ft. Collins 1964
4. Bandwidth reduction by automatic renumbering;Collins;Int. J. Numer. Methods Eng.,1973
5. Fausey , N. R. Numerical model analysis and field study of shallow subsurface drainage Columbus 1975