@techreport{Goldstein,
  author	= {Goldstein, I.},
  month		= oct,
  year		= {1978},
  title		= {Developing a Computational Representation of Problem Solving Skills},
  number	= {495},
  address	= {Cambridge, Mass.},
  institution	= {Massachusetts Institute of Technology, Artificial Intelligence Laboratory},
  type		= {memo}
}