%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Nebosis_etal1993} Nebosis RS, Heusinger MA, Semenov AD, Lang PT, Schatz W, Steinke R, et al. Ultrafast photoresponse of an YBa$_{2}$Cu$_{3}$O$_{7-δ}$ film to far-infrared radiation pulses. Opt Lett. 1993;18(2):96--7.

\end{thebibliography}

\end{document}

