%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Araujo_etal1990} {\textquotedblleft}\textit{Determination of sample thickness via scattered radiation in X-ray fluorescence spectrometry with filtered continuum excitation}{\textquotedblright}. Araujo MF, van Espen P, Van Grieken R, X-ray spectrometry \textbf{19}, 29 (1990).   http://doi.org/10.1002/XRS.1300190107

\end{thebibliography}

\end{document}

