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\bibitem{Neek-Amal_etal2013} {\textquotedblleft}\textit{Realization of free-standing silicene using bilayer graphene}{\textquotedblright}. Neek-Amal M, Sadeghi A, Berdiyorov GR, Peeters FM, Applied physics letters \textbf{103}, 261904 (2013).   http://doi.org/10.1063/1.4852636

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