@InProceedings{	  Griebel:1992*1,
  author	= {M.~Griebel},
  title		= {Multilevel algorithms considered as iterative methods on
		  indefinite systems},
  editor	= {T.~Manteuffel},
  booktitle	= { {Proceedings of the 2nd Copper Mountain Conference on
		  Iterative Methods}},
  publisher	= {University of Colorado at Denver},
  year		= {1992},
  note		= {also as SFB Bericht, 342/29/91 A, Institut f\"{u}r
		  Informatik, TU M\"{u}nchen, 1991},
  annote	= {series}
}