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\bibitem{Bogaerts+Gijbels1997} {\textquotedblleft}\textit{Modeling of glow discharge sources with flat and pin cathodes and implications for mass spectrometric analysis}{\textquotedblright}. Bogaerts A, Gijbels R, Journal of the American Society of Mass Spectrometry \textbf{8}, 1021 (1997).   http://doi.org/10.1016/S1044-0305(97)00120-7

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