%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Treiger_etal1994} {\textquotedblleft}\textit{Non-linear mapping of microbeam proton-induced X-ray emission data for source identification of North Sea aerosols}{\textquotedblright}. Treiger B, Injuk J, Bondarenko I, van Espen P, Van Grieken R, Breitenbach L, W{\"a}tjen U, Spectrochimica acta: part B : atomic spectroscopy \textbf{49}, 345 (1994).   http://doi.org/10.1016/0584-8547(94)80029-4

\end{thebibliography}

\end{document}

