@techreport{Tung-etal88,
  author	= {Tung, Yu-Wen and Matthiessen, Christian M. I. M. and Sondheimer, Norman K.},
  year		= {1988},
  title		= {On Parallelism and the PENMAN Language Generation System},
  number	= {ISI/RR-88-195},
  address	= {Marina del Rey, CA},
  institution	= {USC/Information Sciences Institute}
}