%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Vanderborght+VanGrieken1979} {\textquotedblleft}\textit{Spark-source mass-spectrometric sensitivity factors for elements in a graphite matrix}{\textquotedblright}. Vanderborght B, Van Grieken R, Talanta : the international journal of pure and applied analytical chemistry \textbf{26}, 461 (1979).   http://doi.org/10.1016/0039-9140(79)80111-3

\end{thebibliography}

\end{document}

