%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Lattanzi_etal2013} Lattanzi, M., Riemer-Sorensen, S., Tortola, M., \& Valle, J. W. F. (2013). Updated CMB and x- and gamma-ray constraints on Majoron dark matter. \textit{Phys. Rev. D}, \textit{88}(6), 063528--8pp.

\end{thebibliography}

\end{document}

