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\bibitem{Snoeckx_etal2017} {\textquotedblleft}\textit{Plasma-based liquefaction of methane: The road from hydrogen production to direct methane liquefaction}{\textquotedblright}. Snoeckx R, Rabinovich A, Dobrynin D, Bogaerts A, Fridman A, Plasma processes and polymers \textbf{14}, 1600115 (2017).   http://doi.org/10.1002/ppap.201600115

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