%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Tsoufis_etal2013} {\textquotedblleft}\textit{Incorporation of pure fullerene into organoclays : towards C$_{60}$-pillared clay structures}{\textquotedblright}. Tsoufis T, Georgakilas V, Ke X, Van Tendeloo G, Rudolf P, Gournis D, Chemistry: a European journal \textbf{19}, 7937 (2013).   http://doi.org/10.1002/chem.201300164

\end{thebibliography}

\end{document}

