@incollection{Cohen-Jones89-book,
  author	= {Cohen, Robin and Jones, Marlene},
  editor	= {Kobsa, Alfred and Wahlster, Wolfgang},
  year		= {1989},
  title		= {Incorporating User Models into Expert Systems for Educational Diagnosis},
  pages		= {313--333},
  booktitle	= {User Models in Dialog Systems},
  publisher	= {Springer Verlag, Symbolic Computation Series},
  address	= {Berlin Heidelberg New York Tokyo}
}