@incollection{Guarino94,
  author	= {Guarino, Nicola},
  editor	= {Casati, R. and Smith, B. and White, G.},
  year		= {1994},
  title		= {The Ontological Level},
  booktitle	= {Philosophy and the Cognitive Sciences},
  publisher	= {H{\"o}lder-Pichler-Tempsky},
  address	= {Vienna}
}