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\bibitem{Rouwenhorst_etal2021} {\textquotedblleft}\textit{From the Birkeland{\textendash}Eyde process towards energy-efficient plasma-based NO$_{X}$synthesis: a techno-economic analysis}{\textquotedblright}. Rouwenhorst KHR, Jardali F, Bogaerts A, Lefferts L, Energy \& Environmental Science \textbf{14}, 2520 (2021).   http://doi.org/10.1039/D0EE03763J

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