@InCollection{Areces1999f,
  author =       "C. Areces and C. Monz and H. de Nivelle and M. de
                 Rijke",
  booktitle =    "JFAK. Essays Dedicated to Johan van Benthem on the
                 Occasion of his 50th Birthday",
  publisher =    "Vossiuspers, AUP",
  title =        "The Guarded Fragment: Ins and Outs",
  year =         "1999",
  address =      "Amsterdam",
  editor =       "J. Gerbrandy and M. Marx and M. de Rijke and Y.
                 Venema",
  ISBN =         "90-5629-104-1",
  abstract =     "A discussion of some properties of the Guarded
                 Fragment of first-order logic.",
}