%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Jin+Kuells2020} Jin, Z., \& K{\"u}lls, C. (2020). FDM based OA-ICOS for high accuracy 13C quantification in gaseous CO2. In \textit{IOP Conference Series: Earth and Environmental Science} (Vol. 446, 032061).

\end{thebibliography}

\end{document}

