@TechReport{	  Garcke.Griebel.Thess:2009,
  author	= {J. Garcke and M. Griebel and M. Thess},
  title		= {{Data Mining for the category management in the retail
		  market}},
  institution	= {Institut f\"ur Numerische Simulation, Rheinische
		  Friedrich-Wilhelms-Universit\"at Bonn},
  year		= {2009},
  type		= {Preprint},
  annote	= {data,report},
  pdf		= {http://wissrech.ins.uni-bonn.de/research/pub/garcke/acatech_english.pdf}
		  
}