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\bibitem{Ghorbanfekr-Kalashami_etal2017} {\textquotedblleft}\textit{Spatial design and control of graphene flake motion}{\textquotedblright}. Ghorbanfekr-Kalashami H, Peeters FM, Novoselov KS, Neek-Amal M, Physical review B \textbf{96}, 060101 (2017).   http://doi.org/10.1103/PHYSREVB.96.060101

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