%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Gao_etal2007} Gao, J. R., Hajenius, M., Tichelaar, F. D., Klapwijk, T. M., Voronov, B., Grishin, E., et al. (2007). Monocrystalline NbN nanofilms on a 3C-SiC/Si substrate. \textit{Appl. Phys. Lett.}, \textit{91}(6), 062504 (1 to 3).

\end{thebibliography}

\end{document}

