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\bibitem{Ramakers_etal2015} {\textquotedblleft}\textit{Effect of argon or helium on the CO$_{2}$ conversion in a dielectric barrier discharge}{\textquotedblright}. Ramakers M, Michielsen I, Aerts R, Meynen V, Bogaerts A, Plasma processes and polymers \textbf{12}, 755 (2015).   http://doi.org/10.1002/ppap.201400213

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