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\bibitem{VanBoxem_etal2015} {\textquotedblleft}\textit{Inelastic electron-vortex-beam scattering}{\textquotedblright}. Van Boxem R, Partoens B, Verbeeck J, Physical review : A : atomic, molecular and optical physics \textbf{91}, 032703 (2015).   http://doi.org/10.1103/PhysRevA.91.032703

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