%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{15}

\bibitem{151} X. Binefa, F. Javier Sanchez, F.X. Perez, Xavier Roca, Jordi Vitria, \& Juan J. Villanueva. (1993). Using defocus in optical inspection of integrated circuits. In \textit{Institute of Physics Conferences Series} (Vol. 135, pp. 389--392). Institute of Physics.

\end{thebibliography}

\end{document}

