@InProceedings{ Griebel:1993, author = {M.~Griebel}, title = { Grid- and point-oriented multilevel algorithms}, editor = {W. Hackbusch and G. Wittum}, booktitle = { {Incomplete Decompositions (ILU) - Algorithms, Theory, and Applications, Notes on Numerical Fluid Mechanics}}, volume = {41}, pages = { 32--46}, publisher = {Vieweg Verlag, Braunschweig}, year = {1993}, note = {also as SFB Bericht, 342/14/92 A, Institut f\"{u}r Informatik, TU M\"{u}nchen, 1992}, annote = {series}, ps = {http://wissrech.ins.uni-bonn.de/research/pub/griebel/improve.ps.gz} }