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\bibitem{Janssens+vanEspen1986} {\textquotedblleft}\textit{Evaluation of energy-dispersive x-ray-spectra with the aid of expert systems}{\textquotedblright}. Janssens K, van Espen P, Analytica chimica acta \textbf{191}, 169 (1986).   http://doi.org/10.1016/S0003-2670(00)86306-0

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