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\bibitem{VanGrieken_etal1986} {\textquotedblleft}\textit{Energy-dispersive X-ray spectrometry : present state and trends}{\textquotedblright}. Van Grieken R, Markowicz A, T{\"o}r{\"o}k S, Fresenius{\textquoteright} Zeitschrift f{\"u}r analytische Chemie \textbf{324}, 825 (1986).   http://doi.org/10.1007/BF00473177

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