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\bibitem{Struyf_etal1993} {\textquotedblleft}\textit{Laser microprobe Fourier transform mass spectrometer with external ion source for organic and inorganic microanalysis}{\textquotedblright}. Struyf H, van Roy W, van Vaeck L, van Grieken R, Gijbels R, Caravatti P, Analytica chimica acta \textbf{283}, 139 (1993).   http://doi.org/10.1016/0003-2670(93)85216-7

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