1. A. Brandt, “Multi-level adaptive solutions to boundary-value problems,” Math. Comp., vol. 31, pp. 333–390, 1977.
2. W. Hackbusch, “Convergence of multi-grid iterations applied to difference equations,” Math. Comp., vol. 34, pp. 425–440, 1980.
3. K. Stüben and U. Trottenberg, “Multigrid Methods: Fundamental algorithms, model problem analysis and applications,” in Multigrid Methods, ed. U. Trottenberg, Lecture Notes in Mathematics 960., pp. 1–176, Springer-Verlag, Berlin, 1981.
4. A. Brandt, “Multi-Grid Solvers on Parallel Computers,” ICASE Technical Report 80-23, NASA Langley Research Center, Hampton Va., 1980.
5. D. Gannon and J. van Rosendale, “Highly Parallel Multi-Grid Solvers for Elliptic PDEs: An Experimental Analysis,” ICASE Technical Report 82-36, NASA Langley Research Center, Hampton Va., 1982.