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\bibitem{Xu_etal2012} {\textquotedblleft}\textit{Imaging from atomic structure to electronic structure}{\textquotedblright}. Xu Q, Zandbergen HW, van Dyck D, Micron \textbf{43}, 524 (2012).   http://doi.org/10.1016/j.micron.2011.10.024

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