@TechReport{HorrocksSattler+-LTCS-99-15,
  author =       {I. Horrocks and U. Sattler and S. Tessaris and S. Tobies},
  title =        {Query Containment Using a {DLR} {ABox}},
  institution =  {LuFG Theoretical Computer Science, RWTH Aachen},
  year =         1999,
  type =         {LTCS-Report},  
  number =       {LTCS-99-15},
  address =      {Germany},
  note =         {See http://www-lti.informatik.rwth-aachen.de/Forschung/Reports.html.}
}