@inproceedings{waltz82-AAAI,
  author	= {Waltz, David L.},
  year		= {1982},
  title		= {Event Shape Diagrams},
  booktitle	= {Proceedings of the Second National Conference on Artificial Intelligence},
  pages		= {84--87},
  address	= {Pittsburgh, PA},
  organization	= {American Association for Artificial Intelligence}
}