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\bibitem{Zhang_etal2021} {\textquotedblleft}\textit{Positive and negative streamer propagation in volume dielectric barrier discharges with planar and porous electrodes}{\textquotedblright}. Zhang Q-Z, Zhang L, Yang D-Z, Schulze J, Wang Y-N, Bogaerts A, Plasma Processes And Polymers \textbf{18}, 2000234 (2021).   http://doi.org/10.1002/ppap.202000234

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