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\bibitem{Titantah+Lamoen2008} {\textquotedblleft}\textit{The effect of temperature on the structural, electronic and optical properties of sp$^{3}$-rich amorphous carbon}{\textquotedblright}. Titantah JT, Lamoen D, Journal of physics : condensed matter \textbf{20}, 035216 (2008).   http://doi.org/10.1088/0953-8984/20/03/035216

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