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\bibitem{Schalm+Janssens2003} {\textquotedblleft}\textit{A flexible and accurate quantification algorithm for EPXMA based on thin-film element yields}{\textquotedblright}. Schalm O, Janssens K, Spectrochimica acta: part B : atomic spectroscopy \textbf{58}, 669 (2003).   http://doi.org/10.1016/S0584-8547(02)00290-2

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