%&LaTeX
\documentclass{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{textcomp}

\begin{document}

\begin{thebibliography}{15}

\bibitem{405} Oriol Ramos Terrades and Ernest Valveny. 2003. \textit{Indexing Technical Symbols Using Ridgelets Transform}.

\end{thebibliography}

\end{document}

