%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Geukens_etal2014} {\textquotedblleft}\textit{Ag nanoparticles on mixed Al$_{2}$O$_{3}$-Ga$_{2}$O$_{3}$ supports as catalysts for the N-alkylation of amines with alcohols}{\textquotedblright}. Geukens I, Vermoortele F, Meledina M, Turner S, Van Tendeloo G, De Vos DE, Applied catalysis : A : general \textbf{469}, 373 (2014).   http://doi.org/10.1016/j.apcata.2013.09.044

\end{thebibliography}

\end{document}

