%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{5}

\bibitem{deLange_etal1997} de Lange G, Hu Q, Huang H, Lichtenberger AW. Development of a 170-210 GHz 3{\texttimes}3 micromachined SIS imaging array. In: Proc. 8$^{th}$ Int. Symp. Space Terahertz Technol.; 1997. 518.

\end{thebibliography}

\end{document}

