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\bibitem{Slanina_etal1993} {\textquotedblleft}\textit{The structure, energetics, and harmonic vibrations of B$_{3}$N}{\textquotedblright}. Slanina Z, Martin JML, Fran{\c c}ois JP, Gijbels R, Chemical physics letters \textbf{201}, 54 (1993).   http://doi.org/10.1016/0009-2614(93)85033-K

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