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\bibitem{Potapov_etal2007} {\textquotedblleft}\textit{Inelastic electron holography as a variant of the Feynman thought experiment}{\textquotedblright}. Potapov PL, Verbeeck J, Schattschneider P, Lichte H, van Dyck D, Ultramicroscopy \textbf{107}, 559 (2007).   http://doi.org/10.1016/j.ultramic.2006.11.003

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