References for the Phase Transport Interfaces
1. M.Th. van Genuchten, “A Closed-form Equation for Predicting the Hydraulic Conductivity of Unsaturated Soils,” Soil Sci. Soc. Am. J., vol. 44, 1980.
2. R.H. Brooks and A.T. Corey, “Properties of Porous Media Affecting Fluid Flow,” J. Irrig. Drainage Div., ASCE Proc., vol. 72 (IR2), 1966.