References
- Bear , J. and Dagan , G. 1964 . J. Geophvs. Res.Some exact solutions of interface problems by means of the hodograph method . J. Geophvs. Res. , 69 : 1563 – 1572 .
- Bear , J. 1972 . Dynamics of fluids in porous media , New York : Elsevier .
- Strack , Odl . 1973 . Many valuedness encountered in groundwater flow . Ph.D.Thesis, Delft University of Technology ,
- Josselin de Jong , G. 1981 . The simultaneous flow of fresh and salt water in aquifers of large horizontal extension determined by shear flow and vortex theory , Rotterdam : Balkema .
- Dagan , G. 1967 . Second-order theory of shallow free-surface flow in porous media . Quart. Journ. Mech. and Applied Math , 41 : 517 – 526 .
- J RChang , Hong , C J van , Duijn , Hilhorst , D. and J van , Kester . 1989 . The interface between fresh and salt water : a numerical study . IMA Journal of App. Maths , 42 : 209 – 240 .
- C J Van , Duijn and Hilhorst , D. 1987 . On a doubly nonlinear diffusion equation in hydrology . Nonlinear Analysis. T M A , 11 : 305 – 333 .