%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Gil-Marquez_etal2020} Gil-M{\'a}rquez, J. M., S{\"u}ltenfu{\ss}, J., Andreo, B., \& Mudarra, M. (2020). Groundwater dating tools (3H, 3He, 4He, CFC-12, SF6) coupled with hydrochemistry to evaluate the hydrogeological functioning of complex evaporite-karst settings. \textit{Journal of Hydrology}, \textit{580}, 124263.

\end{thebibliography}

\end{document}

