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\bibitem{Milovanovic_etal2013} {\textquotedblleft}\textit{Graphene hall bar with an asymmetric pn-junction}{\textquotedblright}. Milovanovic SP, Masir MR, Peeters FM, Journal of applied physics \textbf{113}, 193701 (2013).   http://doi.org/10.1063/1.4805350

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