S.J. Farlow, Partial Differential Equations for Scientists & Engineers. John Wiley & Sons(1982), pp310-313.
GeoSlope, Heat and Mass Transfrer Modeling with Geostudio, 2020.
R.W. Lewis & B.A. Schrefler, The Finite Element Method in the Static and Dynamic Deformation and Consolidation of Porous Media, Wiley & Sons(1998), pp161-164.