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\bibitem{Kim_etal2006} {\textquotedblleft}\textit{Impurity scattering of wave packets on a lattice}{\textquotedblright}. Kim W, Covaci L, Marsiglio F, Physical Review B \textbf{74}, 205120 (2006).   http://doi.org/10.1103/PhysRevB.74.205120

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