@incollection{Rosch78,
  author	= {Rosch, E.},
  editor	= {Rosch, E. and Lloyd, B.},
  title		= {Principles of categorization},
  booktitle	= {Cognition and Categorization},
  publisher	= {Lawrence Erlbaum},
  year		= {1978},
  address	= {New Jersey}
}