%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Janssens_etal2010} {\textquotedblleft}\textit{Photon-based techniques for nondestructive subsurface analysis of painted cultural heritage artifacts}{\textquotedblright}. Janssens K, Dik J, Cotte M, Susini J, Accounts of chemical research \textbf{43}, 814 (2010).   http://doi.org/10.1021/AR900248E

\end{thebibliography}

\end{document}

