%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Celis_etal2015} Celis, A., Fuentes-Martin, J., \& Serodio, H. (2015). An invisible axion model with controlled FCNCs at tree level. \textit{Phys. Lett. B}, \textit{741}, 117--123.

\end{thebibliography}

\end{document}

