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\bibitem{Costamagna_etal2012} {\textquotedblleft}\textit{Thermal rippling behavior of graphane}{\textquotedblright}. Costamagna S, Neek-Amal M, Los JH, Peeters FM, Physical review : B : condensed matter and materials physics \textbf{86}, 041408 (2012).   http://doi.org/10.1103/PhysRevB.86.041408

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