@techreport{Hoeppner84,
  author	= {Hoeppner, W. and Morik, K. and Marburger, H.},
  year		= {1984},
  title		= {Talking it Over: The Natural Dialog System HAM-ANS},
  number	= {ANS-26},
  institution	= {Research Unit for Information Science and Artificial Intelligence, University of Hamburg}
}