%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{10}

\bibitem{DiValentino_etal2021} Di Valentino, E., Gariazzo, S., \& Mena, O. (2021). Most constraining cosmological neutrino mass bounds. \textit{Phys. Rev. D}, \textit{104}(8), 083504--7pp.

\end{thebibliography}

\end{document}

