@incollection{Allen97-models,
  author	= {Allen, Robert B.},
  editor	= {Helander, M. and Landauer, T. K. and Prablu, P.},
  year		= {1997},
  title		= {Mental models and user models},
  booktitle	= {Handbook of Human-Computer Interaction. Second, completely revised edition},
  publisher	= {Elsevier Science B.V.}
}