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\bibitem{Wendelen_etal2013} {\textquotedblleft}\textit{Modeling ultrashort laser-induced emission from a negatively biased metal}{\textquotedblright}. Wendelen W, Mueller BY, Autrique D, Bogaerts A, Rethfeld B, Applied physics letters \textbf{103}, 221603 (2013).   http://doi.org/10.1063/1.4830378

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