@InCollection{Kiefer_et_al:2000,
      AUTHOR = {Kiefer, Bernd and Krieger, Hans-Ulrich and Nederhof, Mark-Jan},
      TITLE = {Efficient and Robust Parsing of Word Hypotheses Graphs},
      YEAR = {2000},
      BOOKTITLE = {Verbmobil: Foundations of Speech-to-Speech Translation},
      PAGES = {280-295},
      EDITOR = {Wahlster, Wolfgang},
      ADDRESS = {Berlin},
      PUBLISHER = {Springer},
      ABSTRACT = {This paper describes new and improved techniques which help a unification-based parser to process input efficiently and robustly. In combination these methods result in a speed-up in parsing time of more than an order of magnitude. The methods are correct in the sense that none of them rule out legal rule applications.}
}