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\bibitem{Bal_etal2017} {\textquotedblleft}\textit{Structures and spectroscopic properties of sulfur-nitrogen-pnictogen chains : R$_{2}$P-N=S=N-PR$_{2}$ and R$_{2}$P-N=S=N-AsR$_{2}$}{\textquotedblright}. Bal KM, Cautereels J, Blockhuys F, Journal of molecular structure \textbf{1132}, 102 (2017).   http://doi.org/10.1016/J.MOLSTRUC.2016.08.008

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