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\bibitem{Dufour_etal2014} {\textquotedblleft}\textit{Understanding polyethylene surface functionalization by an atmospheric He/O$_{2}$ plasma through combined experiments and simulations}{\textquotedblright}. Dufour T, Minnebo J, Abou Rich S, Neyts EC, Bogaerts A, Reniers F, Journal of physics: D: applied physics \textbf{47}, 224007 (2014).   http://doi.org/10.1088/0022-3727/47/22/224007

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