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\bibitem{Radtke_etal2006} {\textquotedblleft}\textit{Electron inelastic, scattering and anisotropy: the two-dimensional point of view}{\textquotedblright}. Radtke G, Botton GA, Verbeeck J, Ultramicroscopy \textbf{106}, 1082 (2006).   http://doi.org/10.1016/j.ultramic.2006.04.023

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