%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{5}

\bibitem{Kawamura_etal1997} Kawamura, J., Blundell, R., Tong, C. - Y. E., Gol{\textquoteright}tsman, G., Gershenzon, E., Voronov, B., et al. (1997). Phonon-cooled NbN HEB mixers for submillimeter wavelengths. In \textit{Proc. 8$^{th}$ Int. Symp. Space Terahertz Technol.} (pp. 23--28).

\end{thebibliography}

\end{document}

