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\bibitem{Yu_etal2003} {\textquotedblleft}\textit{Electron acceleration by an intense short-pulse laser in underdense plasma}{\textquotedblright}. Yu MY, Yu W, Chen ZY, Zhang J, Yin Y, Cao LH, Lu PX, Xu ZZ, Physics of plasmas \textbf{10}, 2468 (2003).   http://doi.org/10.1063/1.1572158

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