%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Sleegers2021} Sleegers N (2021) Cephalosporin antibiotics : electrochemical fingerprints and redox pathways investigated by mass spectral analysis. 208 p

\end{thebibliography}

\end{document}

