%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Horemans+VanGrieken2010} {\textquotedblleft}\textit{Speciation and diurnal variation of thoracic, fine thoracic and sub-micrometer airborne particulate matter at naturally ventilated office environments}{\textquotedblright}. Horemans B, Van Grieken R, Atmospheric environment : an international journal \textbf{44}, 1497 (2010).   http://doi.org/10.1016/J.ATMOSENV.2010.01.010

\end{thebibliography}

\end{document}

