%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Sillanpaeae_etal2006} {\textquotedblleft}\textit{Chemical composition and mass closure of particulate matter at six urban sites in Europe}{\textquotedblright}. Sillanp{\"a}{\"a} M, Hillamo R, Saarikoski S, Frey A, Pennanen A, Makkonen U, Spolnik Z, Van Grieken R, Brani{\v s} M, Brunekreef B, Chalbot M-C, Kuhlbusch T, Sunyer J, Kerminen V-M, Kulmala M, Salonen RO, Atmospheric environment : an international journal \textbf{40}, S212 (2006).   http://doi.org/10.1016/J.ATMOSENV.2006.01.063

\end{thebibliography}

\end{document}

