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\bibitem{Yang_etal2010} {\textquotedblleft}\textit{Density of states and magneto-optical conductivity of graphene in a perpendicular magnetic field}{\textquotedblright}. Yang CH, Peeters FM, Xu W, Physical review : B : condensed matter and materials physics \textbf{82}, 205428 (2010).   http://doi.org/10.1103/PhysRevB.82.205428

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