%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Sillanpaeae_etal2005} {\textquotedblleft}\textit{Chemical composition, mass size distribution and source analysis of long-range transported wildfire smokes in Helsinki}{\textquotedblright}. Sillanp{\"a}{\"a} M, Saarikoski S, Hillamo R, Pennanen A, Makkonen U, Spolnik Z, Van Grieken R, Koskentalo T, Salonen RO, The science of the total environment \textbf{350}, 119 (2005).   http://doi.org/10.1016/J.SCITOTENV.2005.01.024

\end{thebibliography}

\end{document}

