@Article{nle,
  author =       "Gertjan van Noord and Gosse Bouma and Rob Koeling and
                 Mark-Jan Nederhof",
  title =        "Robust Grammatical Analysis for Spoken Dialogue
                 Systems",
  journal =      "Journal of Natural Language Engineering",
  volume =       "5",
  number =       "1",
  pages =        "45--93",
  year =         "1999",
}