@incollection{Birnbaum-selfridge81,
  author	= {Birnbaum, L. and Selfridge, M.},
  editor	= {Schank, Roger C. and Riesbeck, C. K.},
  year		= {1981},
  title		= {Conceptual Analysis of Natural Language},
  booktitle	= {Inside Computer Understanding},
  pages		= {318--353},
  publisher	= {Lawrence Erlbaum Associates},
  address	= {Hillsdale, New Jersey}
}