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\bibitem{Tsonev_etal2023} {\textquotedblleft}\textit{Nitrogen Fixation by an Arc Plasma at Elevated Pressure to Increase the Energy Efficiency and Production Rate of NO$_{\textit{x}}$}{\textquotedblright}. Tsonev I, O{\textquoteright}Modhrain C, Bogaerts A, Gorbanev Y, ACS Sustainable Chemistry and Engineering \textbf{11}, 1888 (2023).   http://doi.org/10.1021/acssuschemeng.2c06357

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