@TechReport{AIB-2007-05,
  author =	 "Uwe Naumann",
  title =	 "On Optimal DAG Reversal",
  institution =	 "RWTH Aachen",
  year =	 "2007",
  number =	 "AIB-2007-05",
  month =	 mar,
  url =          "http://aib.informatik.rwth-aachen.de/2007/2007-05.ps.gz",
}