@TechReport{Hirsch-Tobies-LTCS-00-03,
  author =       {C.~Hirsch and S.~Tobies},
  title =        {A Tableaux Algorithm for the Clique Guarded Fragment, Preliminary Version},   
  institution =  {LuFG Theoretical Computer Science, RWTH Aachen},
  year =         2000,
  type =         {LTCS-Report},  
  number =       {LTCS-00-03},
  address =      {Germany},
  note =         {See http://www-lti.informatik.rwth-aachen.de/Forschung/Reports.html.}
}