@incollection{denOuden-etal98,
  author	= {den Ouden, J. N. and van Wiik, C. H. and Terken, J. M. B. and Noordman, L. G. M.},
  year		= {1998},
  title		= {Reliability of discourse structure annotation},
  booktitle	= {IPO Center for research on user-system interaction, Annual Progress Report},
  number	= {33},
  pages		= {129--138},
  publisher	= {Technische Universiteit Eindhoven}
}