%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Cai_etal2006} {\textquotedblleft}\textit{Short-pulse laser absorption in very steep plasma density gradients}{\textquotedblright}. Cai H-bo, Yu W, Zhu S-ping, Zheng C-yang, Cao L-hua, Li B, Chen ZY, Bogaerts A, Physics of plasmas \textbf{13}, 094504 (2006).   http://doi.org/10.1063/1.2354583

\end{thebibliography}

\end{document}

