@TechReport{BaGiTiLTCS-03-05,
  author =       {F.~Baader and Silvio Ghilardi and Cesare Tinelli},
  title =        {A New Combination Procedure for the Word Problem
       that Generalizes Fusion Decidability Results in Modal Logics},
  institution =  {Chair for Automata Theory, Institute for Theoretical
                  Computer Science, Dresden University of Technology},
  year =         2003,
  type =         {LTCS-Report},
  number =       {LTCS-03-05},
  address =      {Germany},
  note =         {See
                  http://lat.inf.tu-dresden.de/research/reports.html.}
}