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\bibitem{VanDuppen+Peeters2013} {\textquotedblleft}\textit{Klein paradox for a pn junction in multilayer graphene}{\textquotedblright}. Van Duppen B, Peeters FM, Europhysics letters \textbf{102}, 27001 (2013).   http://doi.org/10.1209/0295-5075/102/27001

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