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\bibitem{VanPottelberge_etal2018} {\textquotedblleft}\textit{Comment on {\textquotedblleft}Impurity spectra of graphene under electric and magnetic fields{\textquotedblright}}{\textquotedblright}. Van Pottelberge R, Zarenia M, Peeters FM, Physical review B \textbf{97}, 207403 (2018).   http://doi.org/10.1103/PHYSREVB.97.207403

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