@TechReport{BonattiLutzWolter-LTCS-05-06,
  author =       {P.~Bonatti and C.~Lutz and F.~Wolter},
  title =        {Expressive Non-Monotonic Description Logics Based on Circumscription},
  institution =  {Chair for Automata Theory, Institute for Theoretical
                  Computer Science, Dresden University of Technology},
  year =         2005,
  type =         {LTCS-Report},
  number =       {LTCS-05-06},
  address =      {Germany},
  note =         {See
                  http://lat.inf.tu-dresden.de/research/reports.html.}

}