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\bibitem{Sivek_etal2013} {\textquotedblleft}\textit{Adsorption and absorption of boron, nitrogen, aluminum, and phosphorus on silicene : stability and electronic and phonon properties}{\textquotedblright}. Sivek J, Sahin H, Partoens B, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{87}, 085444 (2013).   http://doi.org/10.1103/PhysRevB.87.085444

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