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\begin{thebibliography}{1}

\bibitem{FM92}
D.~Forsyth, J.L. Mundy, and A.~Zisserman.
\newblock Transformational invariance - a primer.
\newblock {\em Image and Vision Computing}, 10(1):39--45, février 1992.

\bibitem{SM94}
H.~Schulz-Mirbach.
\newblock Constructing invariant features by averaging techniques.
\newblock In {\em Proc. of the IEEE Int. Conf. on Pattern Recognition}, pages
  387--390, Jerusalem, Israel, 25-28 octobre 1994.

\end{thebibliography}
