%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Bernal_etal2020} Bernal, N., Donini, A., Folgado, M. G., \& Rius, N. (2020). Kaluza-Klein FIMP dark matter in warped extra-dimensions. \textit{J. High Energy Phys.}, \textit{09}(9), 142--31pp.

\end{thebibliography}

\end{document}

