@TechReport{Freiling:2005:TBE
  author =	 "Felix C. Freiling and Thorsten Holz and Georg Wicherski"
  title =	 "Botnet Tracking: Exploring a Root-Cause Methodology to Prevent
		  Distributed Denial-of-Service Attacks",
  institution =	 "RWTH Aachen",
  year =	 "2005",
  number =	 "AIB-2005-07",
  month =	 apr,
  url =          "http://aib.informatik.rwth-aachen.de/2005/2005-07.ps.gz",
}