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\bibitem{Pizzochero_etal2015} {\textquotedblleft}\textit{Hydrogen adsorption on nitrogen and boron doped graphene}{\textquotedblright}. Pizzochero M, Leenaerts O, Partoens B, Martinazzo R, Peeters FM, Journal of physics : condensed matter \textbf{27}, 425502 (2015).   http://doi.org/10.1088/0953-8984/27/42/425502

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