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\bibitem{Kempenaers_etal2003} {\textquotedblleft}\textit{Micro-heterogeneity study of trace elements in USGS, MPI-DING and glass reference materials by means of synchrotron micro-XRF}{\textquotedblright}. Kempenaers L, Janssens K, Jochum KP, Vincze L, Vekemans B, Somogyi A, Drakopoulos M, Adams F, Journal of analytical atomic spectrometry \textbf{18}, 350 (2003).   http://doi.org/10.1039/B212196D

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