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\bibitem{Masir_etal2009} {\textquotedblleft}\textit{Magnetic Kronig-Penney model for Dirac electrons in single-layer graphene}{\textquotedblright}. Masir MR, Vasilopoulos P, Peeters FM, New journal of physics \textbf{11}, 095009 (2009).   http://doi.org/10.1088/1367-2630/11/9/095009

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