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\bibitem{Cabal_etal2015} {\textquotedblleft}\textit{Comparison of x-ray absorption and emission techniques for the investigation of paintings}{\textquotedblright}. Cabal A, Schalm O, Eyskens P, Willems P, Harth A, van Espen P, X-ray spectrometry \textbf{44}, 141 (2015).   http://doi.org/10.1002/XRS.2591

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