1. M. B. Allen, R. E. Ewing, and P. Lu, Well conditioned iterative schemes for mixed finite element models of porous-media flows, SIAM Journal of Scientific and Statistical Computing, 13(3) (1992), 794–814.
2. M. Ainsworth and J. T. Oden, A unified approach to a aposteriori error estimators based on element residual methods, Numer. Math., 65 (1993), 23–50.
3. B. Amaziane, and A. Bourgeat, Effective behavior of two-phase flow in heterogeneous reservoir, Numerical Simulation in Oil Recovery, ed. M. F. Wheeler, IMA Volumes in Mathematics and Its Application, Springer Verlag, 11 (1988), 1–22.
4. B. Amaziane, A. Bourgeat, and J. Koebbe, Numerical simulation and homogenization of two-phase flow in heterogeneous porous media, Transport in Porous Media (to appear ).
5. T. Arbogast, C. N. Dawson, and P. T. Keenan, Efficient mixed methods for groundwater flow on triangular or tetrahedral meshes, Comp. Meth. Water Resources X 1 (A. Peters et al., eds.), Kluwer Academic Publishers, Dordrecht, The Netherlands, 1994, pp. 3–10.