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\bibitem{Grujic_etal2011} {\textquotedblleft}\textit{Electronic and optical properties of a circular graphene quantum dot in a magnetic field : influence of the boundary conditions}{\textquotedblright}. Gruji{\'c} M, Zarenia M, Chaves A, Tadi{\'c} M, Farias GA, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{84}, 205441 (2011).   http://doi.org/10.1103/PhysRevB.84.205441

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