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\bibitem{Krstajic+Peeters2012} {\textquotedblleft}\textit{Energy-momentum dispersion relation of plasmarons in graphene}{\textquotedblright}. Krstaji{\'c} PM, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{85}, 205454 (2012).   http://doi.org/10.1103/PhysRevB.85.205454

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