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\bibitem{Sofo_etal2011} {\textquotedblleft}\textit{Electrical control of the chemical bonding of fluorine on graphene}{\textquotedblright}. Sofo JO, Suarez AM, Usaj G, Cornaglia PS, Hern{\'a}ndez-Nieves AD, Balseiro CA, Physical review : B : condensed matter and materials physics \textbf{83}, 081411 (2011).   http://doi.org/10.1103/PhysRevB.83.081411

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