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\bibitem{Zhang_etal2012} {\textquotedblleft}\textit{Separate control between geometrical and electrical asymmetry effects in capacitively coupled plasmas}{\textquotedblright}. Zhang Q-Z, Zhao S-X, Jiang W, Wang Y-N, Journal of physics: D: applied physics \textbf{45}, 305203 (2012).   http://doi.org/10.1088/0022-3727/45/30/305203

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