1. Simulation of two-phase flow by finite element methods;Langsrud;Paper No. SPE 5725,1976
2. Calculation of unsteady-state gas flow through porous medium;Bruce;Petroleum Trans., AIME No. 198,1953
3. A method for calculating multidimensional immiscible displacement;Douglas;Petroleum Trans., AIME,1959
4. A numerical coning model;Litkeman;SPEJ,1970
5. Numerical solution of the nonlinear equations for two-phase flow through porous media;Peaceman,1967