%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Alfeld_etal2013} {\textquotedblleft}\textit{Visualizing the 17th century underpainting in Portrait of an Old Man by Rembrandt van Rijn using synchrotron-based scanning macro-XRF}{\textquotedblright}. Alfeld M, Siddons DP, Janssens K, Dik J, Woll A, Kirkham R, van de Wetering E, Applied physics A : materials science \& processing \textbf{111}, 157 (2013).   http://doi.org/10.1007/S00339-012-7490-5

\end{thebibliography}

\end{document}

