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\bibitem{Milovanovic_etal2015} {\textquotedblleft}\textit{Veselago lensing in graphene with a p-n junction: Classical versus quantum effects}{\textquotedblright}. Milovanovi{\'c} SP, Moldovan D, Peeters FM, Journal of applied physics \textbf{118}, 154308 (2015).   http://doi.org/10.1063/1.4933395

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