\begin{thebibliography}{1}

\bibitem{car:04}
A.~M. Carvalho.
\newblock Efficient algorithms for structured motif extraction in {DNA}
  sequences.
\newblock Master's thesis, IST, Universidade T\'ecnica de Lisboa, 2004.
\newblock Supervised by A. T. Freitas and A. L. Oliveira.

\end{thebibliography}