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\bibitem{Tsuji_etal1999} {\textquotedblleft}\textit{Elemental x-ray images obtained by grazing-exit electron probe microanalysis (GE-EPMA)}{\textquotedblright}. Tsuji K, Nullens R, Wagatsuma K, Van Grieken RE, Journal of analytical atomic spectrometry \textbf{14}, 1711 (1999).   http://doi.org/10.1039/A905301H

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