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\bibitem{Lindner+Bogaerts2011} {\textquotedblleft}\textit{Multi-element model for the simulation of inductively coupled plasmas : effects of helium addition to the central gas stream}{\textquotedblright}. Lindner H, Bogaerts A, Spectrochimica acta: part B : atomic spectroscopy \textbf{66}, 421 (2011).   http://doi.org/10.1016/j.sab.2011.04.007

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