2. Z. Chen, G. Huan, and Y. Ma, Computational Methods for Multiphase Flows in Porous Media. Philadelphia: Society for Industrial and Applied Mathematics, 2006.

3. M.Th. van Genuchten, “A Closed-form Equation for Predicting the Hydraulic Conductivity of Unsaturated Soils,” Soil Sci. Soc. Am. J., vol. 44, 1980.

4. R.H. Brooks and A.T. Corey, “Properties of Porous Media Affecting Fluid Flow,” J. Irrig. Drainage Div., ASCE Proc., vol. 72 (IR2), 1966.