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\bibitem{VanPottelberge+Peeters2019} {\textquotedblleft}\textit{Tunable circular dipolelike system in graphene : mixed electron-hole states}{\textquotedblright}. Van Pottelberge R, Peeters FM, Physical review B \textbf{99}, 125426 (2019).   http://doi.org/10.1103/PHYSREVB.99.125426

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