%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{1638} Oriol Rodriguez-Leon, Josefina Mauri, Eduard Fernandez-Nofrerias, M.Gomez, Antonio Tovar, L.Cano, et al. (2002).\textbf{" Ecografia Intracoron{\`a}ria: Segmentaci{\'o} Autom{\`a}tica de area de la llum" } In \textit{XXXVIII Congreso Nacional de la Sociedad Espa{\~n}ola de Cardiolog{\'\i}a.}.

\end{thebibliography}

\end{document}

