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\bibitem{Zarenia_etal2011} {\textquotedblleft}\textit{Chiral states in bilayer graphene : magnetic field dependence and gap opening}{\textquotedblright}. Zarenia M, Pereira JM, Farias GA, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{84}, 125451 (2011).   http://doi.org/10.1103/PhysRevB.84.125451

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