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\bibitem{Ackerman_etal2016} {\textquotedblleft}\textit{Anomalous dynamical behavior of freestanding graphene membranes}{\textquotedblright}. Ackerman ML, Kumar P, Neek-Amal M, Thibado PM, Peeters FM, Singh S, Physical review letters \textbf{117}, 126801 (2016).   http://doi.org/10.1103/PHYSREVLETT.117.126801

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