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\bibitem{Guzzinati_etal2017} {\textquotedblleft}\textit{Probing the symmetry of the potential of localized surface plasmon resonances with phase-shaped electron beams}{\textquotedblright}. Guzzinati G, B{\'e}ch{\'e} A, Louren{\c c}o-Martins H, Martin J, Kociak M, Verbeeck J, Nature communications \textbf{8}, 14999 (2017).   http://doi.org/10.1038/ncomms14999

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