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\bibitem{Zarenia_etal2013} {\textquotedblleft}\textit{Snake states in graphene quantum dots in the presence of a p-n junction}{\textquotedblright}. Zarenia M, Pereira JM Jr, Peeters FM, Farias GA, Physical review : B : condensed matter and materials physics \textbf{87}, 035426 (2013).   http://doi.org/10.1103/PhysRevB.87.035426

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