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\bibitem{Leigh_etal2024} {\textquotedblleft}\textit{Ionization and neutral gas heating efficiency in radio frequency electrothermal microthrusters : the role of driving frequency}{\textquotedblright}. Leigh S, Doyle SJ, Smith GJ, Gibson AR, Boswell RW, Charles C, Dedrick JP, Physics of plasmas \textbf{31}, 023509 (2024).   http://doi.org/10.1063/5.0172646

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