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\bibitem{Nourbakhsh_etal2010} {\textquotedblleft}\textit{Tuning the Fermi level of SiO$_{2}$-supported single-layer graphene by thermal annealing}{\textquotedblright}. Nourbakhsh A, Cantoro M, Klekachev A, Clemente F, Sor{\'e}e B, van der Veen MH, Vosch T, Stesmans A, Sels B, de Gendt S, Journal Of Physical Chemistry C \textbf{114}, 6894 (2010).   http://doi.org/10.1021/jp910085n

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