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\bibitem{Zarenia_etal2011} {\textquotedblleft}\textit{Topological confinement in an antisymmetric potential in bilayer graphene in the presence of a magnetic field}{\textquotedblright}. Zarenia M, Pereira JM, Peeters FM, Farias G de A, Nanoscale research letters \textbf{6}, 452 (2011).   http://doi.org/10.1186/1556-276X-6-452

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