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\bibitem{Leenaerts_etal2017} {\textquotedblleft}\textit{The work function of few-layer graphene}{\textquotedblright}. Leenaerts O, Partoens B, Peeters FM, Volodin A, van Haesendonck C, Journal of physics : condensed matter \textbf{29}, 035003 (2017).   http://doi.org/10.1088/0953-8984/29/3/035003

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