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\bibitem{Martin_etal1994} {\textquotedblleft}\textit{Ab initio study of the spectroscopy, kinetics, and thermochemistry of the C$_{2}$N and CN$_{2}$ molecules}{\textquotedblright}. Martin JML, Taylor PR, Fran{\c c}ois JP, Gijbels R, Chemical physics letters \textbf{226}, 475 (1994).   http://doi.org/10.1016/0009-2614(94)00758-6

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