Chivers, T.: Synthetic methods and structure-reactivity relationships in electron-rich sulfur-nitrogen rings and cages in Chem. Rev. 85 (1985) 341–365, doi:10.1021/cr00069a001.
Mawhinney, R.C.; Goddard, J.C: Lowest Singlet and Triplet Potential Energy Surfaces of S2N2 in Inorg. Chem. 42 (2003) 6323–6337, doi:10.1021/ic0301270.