%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Dragan_etal2021} {\textquotedblleft}\textit{Electrochemical fingerprints of illicit drugs on graphene and multi-walled carbon nanotubes}{\textquotedblright}. Dragan A-M, Truta FM, Tertis M, Florea A, Schram J, Cernat A, Feier B, De Wael K, Cristea C, Oprean R, Frontiers In Chemistry \textbf{9}, 641147 (2021).   http://doi.org/10.3389/FCHEM.2021.641147

\end{thebibliography}

\end{document}

