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\bibitem{Zhang_etal2014} {\textquotedblleft}\textit{Electron energy and temperature relaxation in graphene on a piezoelectric substrate}{\textquotedblright}. Zhang SH, Xu W, Peeters FM, Badalyan SM, Physical review : B : condensed matter and materials physics \textbf{89}, 195409 (2014).   http://doi.org/10.1103/PhysRevB.89.195409

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