%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Liu_etal2008} {\textquotedblleft}\textit{Preparation of hollow silica spheres with different mesostructures}{\textquotedblright}. Liu S, Rao J, Sui X, Cool P, Vansant EF, Van Tendeloo G, Cheng X, Journal of non-crystalline solids \textbf{354}, 826 (2008).   http://doi.org/10.1016/j.jnoncrysol.2007.08.026

\end{thebibliography}

\end{document}

