1. Gmelin Handbook of Inorganic Chemistry, 8th Ed, Sulfur-Nitrogen Compounds, Part 2, Springer-Verlag, Berlin (1985).
2. Electron-rich sulfur-nitrogen heterocycles
3. Polysulfur nitride - a metallic, superconducting polymer
4. S. T. A. K. Daley and C. W. Rees, J. Chem. Soc., Perkin Trans. 1, 203 (1987).
5. J. L. Morris and C. W. Rees, J. Chem. Soc., Perkin Trans. 1, 211 (1987).