@Article{HeiSSW12,
  author =	 {Stefan Heinz and Thomas Schlechte and R\"udiger Stephan and Michael Winkler},
  title =	 {Solving steel mill slab design problems},
  journal =	 {Constraints},
  pages =	 {39--50},
  year =	 {2012},
  volume =	 {17},
  number =	 {1},
  note =	 {Letter}
}

@TechReport{HeiSSW11TR,
  author =	 {Stefan Heinz and Thomas Schlechte and R\"udiger Stephan and Michael Winkler},
  title =	 {Solving steel mill slab design problems},
  type =	 {ZIB-Report},
  institution =	 {Zuse Institute Berlin},
  year =	 {2011},
  number =	 {11-38}
}