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\bibitem{Vekemans_etal1994} {\textquotedblleft}\textit{Analysis of X-ray spectra by iterative least squares (AXIL): new developments}{\textquotedblright}. Vekemans B, Janssens K, Vincze L, Adams F, van Espen P, X-ray spectrometry \textbf{23}, 278 (1994).   http://doi.org/10.1002/XRS.1300230609

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