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\bibitem{Alfeld+Janssens2015} {\textquotedblleft}\textit{Strategies for processing mega-pixel X-ray fluorescence hyperspectral data: a case study on a version of Caravaggio{\textquoteright}s painting Supper at Emmaus}{\textquotedblright}. Alfeld M, Janssens K, Journal of analytical atomic spectrometry \textbf{30}, 777 (2015).   http://doi.org/10.1039/C4JA00387J

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