@incollection{BerwangerBlumensath02b,
  booktitle = {{Automata, Logic, and Infinite Games}},
  year = 2002,
  series = {{LNCS 2500}},
  title = {{Automata for Guarded Fixed Point Logics}},
  pages = {343--355},
  editor = {E. {Gr\"adel} and W. Thomas and T. Wilke},
  author = {D. Berwanger and A. Blumensath},
  publisher = {Springer Verlag},
}