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\bibitem{Titantah+Lamoen2005} {\textquotedblleft}\textit{sp$^{3}$/sp$^{2}$ characterization of carbon materials from first-principles calculations: X-ray photoelectron versus high energy electron energy-loss spectroscopy techniques}{\textquotedblright}. Titantah JT, Lamoen D, Carbon \textbf{43}, 1311 (2005).   http://doi.org/10.1016/j.carbon.2005.01.002

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