1. K. Aziz and A. Settari. Petroleum Reservoir Simulation. Elsevier, 1979.
2. R. Bank . PLTMG Users Guide Version 7.0, SIAM, 1994.
3. R. Bank and C. Wagner. Multilevel ILU decomposition, Numerische Mathematik, accepted.
4. P. Bastian. Parallele adaptive Mehrgitterverfahren, Teubner Skripten zur Numerik, Teubner-Verlag, 1996.
5. P. Bastian, K. Birken, K. Johannsen, S. Lang, N. Neuss, H. Rentz-Reichert, and C. Wieners. UG — a flexible software toolbox for solving partial differential equations. Computation and Visualization in Science, (1), 1997.