%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{deBock_etal1998} {\textquotedblleft}\textit{Extraction of environmental information from large aerosol data sets through combined application of cluster and factor analysis}{\textquotedblright}. de Bock LA, Treiger B, van der Auwera L, Van Grieken RE, Microchimica acta \textbf{128}, 191 (1998).   http://doi.org/10.1007/BF01243049

\end{thebibliography}

\end{document}

