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\bibitem{Pennycook_etal2019} {\textquotedblleft}\textit{High dose efficiency atomic resolution imaging via electron ptychography}{\textquotedblright}. Pennycook TJ, Martinez GT, Nellist PD, Meyer JC, Ultramicroscopy \textbf{196}, 131 (2019).   http://doi.org/10.1016/J.ULTRAMIC.2018.10.005

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