@InCollection{	  dix99,
  author	= {J\"{u}rgen Dix},
  title		= {Cognitive {S}ystems},
  pages		= {531--540},
  booktitle	= {Encyclopedia of Electrical and Electronics Engineering, 24
		  Volumes},
  publisher	= {John Wiley \& Sons},
  address	= {Chicester, New York},
  year		= {1999},
  editor	= {John G. Webster}
}