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\bibitem{Bogaerts_etal2002} {\textquotedblleft}\textit{Gas discharge plasmas and their applications}{\textquotedblright}. Bogaerts A, Neyts E, Gijbels R, van der Mullen J, Spectrochimica acta: part B : atomic spectroscopy \textbf{57}, 609 (2002).   http://doi.org/10.1016/S0584-8547(01)00406-2

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