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\bibitem{Martin_etal1994} {\textquotedblleft}\textit{The structure, energetics, and harmonic vibrations of B$_{3}$N and BN$_{3}$}{\textquotedblright}. Martin JML, Slanina Z, Fran{\c c}ois JP, Gijbels R, Molecular physics \textbf{82}, 155 (1994).   http://doi.org/10.1080/00268979400100114

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