\begin{thebibliography}{1}

\bibitem{Picci:06}
Giorgio Picci.
\newblock {\em Fitraggio Statistico (Wiener, Levinson, Kalman) e Applicazioni}.
\newblock Libreria Progetto, 2006.

\bibitem{Julier:96}
J.~Uhlmann S.~Julier.
\newblock A general method for approximating nonlinear transformations of
  probability distributions.
\newblock Technical report, University of Oxford, 1996.

\bibitem{Merwe:04}
E.~Wan R.~van~der Merwe.
\newblock Sigma-point kalman filters for integrated navigation.
\newblock {\em Proceedings of the 60th Annual of the Institute of Navigation},
  2004.

\bibitem{Fiorenzani:02}
G.~Oriolo P.~Peliti T.~Fiorenzani, C.~Manes.
\newblock Comparative study of unscented kalman filter and extended kalman
  filter for position/attitude estimation in unmanned aerial vehicles.
\newblock Technical report, IASI CNR, 2002.

\end{thebibliography}