\begin{thebibliography}{1}

\bibitem{TownPhD}
C.P. Town.
\newblock {\em Ontology based Visual Information Processing}.
\newblock PhD thesis, University of Cambridge, 2004.

\bibitem{Town2004}
C.P. Town and D.A. Sinclair.
\newblock Language-based querying of image collections on the basis of an
  extensible ontology.
\newblock {\em International Journal of Image and Vision Computing},
  22(3):251--267, 2004.

\end{thebibliography}
