%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Kuczumov_etal1999} {\textquotedblleft}\textit{Analyses of petrified wood by electron, X-ray and optical microprobes}{\textquotedblright}. Kuczumov A, Vekemans B, Schalm O, Dorrin{\'e} W, Chevallier P, Dillmann P, Ro C-U, Janssens K, Van Grieken R, Journal of analytical atomic spectroscopy \textbf{14}, 435 (1999).   http://doi.org/10.1039/A806748A

\end{thebibliography}

\end{document}

