%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Cagno_etal2015} {\textquotedblleft}\textit{The use of vitrum obsianum in the Roman Empire: some new insights and future prospects}{\textquotedblright}. Cagno S, Cosyns P, Ceglia A, Nys K, Janssens K, Periodico di mineralogia \textbf{84}, 465 (2015).   http://doi.org/10.2451/2015PM0026

\end{thebibliography}

\end{document}

