@incollection{Staff-97,
  author	= {Staff, Christopher},
  editor	= {Jameson, A. and Paris, C. and Tasso, C.},
  title		= {HyperContextr: A model for Adaptive Hypertext},
  booktitle	= {Proceedings of the Sixth International Conference on User Modeling (UM97)},
  pages		= {33--39},
  year		= {1997},
  address	= {Berlin},
  month		= jun,
  publisher	= {Springer},
  note		= {(Chia Laguna, Sardinia, Italy)}
}