@TechReport{Lutz-LTCS-99-01,
  author =       {Lutz, C.},
  title =        {The Complexity of Reasoning with Concrete Domains (Revised Version)},   
  institution =  {LuFG Theoretical Computer Science, RWTH Aachen},
  year =         1999,
  type =         {LTCS-Report},  
  number =       {LTCS-99-01},
  address =      {Germany},
  note =         {See http://www-lti.informatik.rwth-aachen.de/Forschung/Papers.html.}
}