%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Geim_etal1997} {\textquotedblleft}\textit{Phase transitions in individual sub-micrometre superconductors}{\textquotedblright}. Geim AK, Grigorieva IV, Dubonos SV, Lok JGS, Maan JC, Filippov AE, Peeters FM, Nature \textbf{390}, 259 (1997).   http://doi.org/10.1038/36797

\end{thebibliography}

\end{document}

