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\bibitem{vandenBroek_etal2009} {\textquotedblleft}\textit{Tomographic spectroscopic imaging, an experimental proof of concept}{\textquotedblright}. van den Broek W, Verbeeck J, Schryvers D, de Backer S, Scheunders P, Ultramicroscopy \textbf{109}, 296 (2009).   http://doi.org/10.1016/j.ultramic.2008.11.022

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