@Article{	  Bungartz.Griebel:1999,
  author	= {H.-J. Bungartz and M. Griebel},
  title		= {A Note on the Complexity of Solving {P}oisson's Equation
		  for Spaces of Bounded Mixed Derivatives},
  journal	= {J. Complexity},
  volume	= {15},
  pages		= {167--199},
  annote	= {article},
  note		= {also as Report No 524, SFB 256, Univ. Bonn, 1997},
  year		= {1999},
  ps		= {http://wissrech.ins.uni-bonn.de/research/pub/griebel/energie.ps.gz}
		  
}