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\bibitem{Cakir_etal2015} {\textquotedblleft}\textit{Significant effect of stacking on the electronic and optical properties of few-layer black phosphorus}{\textquotedblright}. {\c C}akir D, Sevik C, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{92}, 165406 (2015).   http://doi.org/10.1103/PhysRevB.92.165406

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