1. For a review: R. A.Hayes and J. C.Martin, Sulfurane Chemistry in Organic Sulfur Chemistry, and Experimental Advances, eds. F. Bernardi, I. G. Csizmadia and A. Mangini, Elsevier, Amsterdam, 1985, ch. 8.
2. The Chemistry of Organic Selenium and Tellurium Compounds, vol. 1, eds. S. Patai and Z. Rappoport, Wiley, New York, 1986, ch. 3 and 14. The term tellurane has been used for tetracoordinate tellurium(IV) compounds.
3. The Organic Chemistry of Tellurium, K. J.Irgolic, Gordon and Breach Science Publishers, New York, 1974.
4. SIV–SIV bond: the existence of a SIV–SIV bisulfuranyl dimer, in equilibrium with a sulfuranyl radical, as evidenced by ESR and NMR spectroscopy has been reported;
5. Reversible equilibrium for the dimerization of a 9-S-3 sulfuranyl radical: the S(IV)-O dimer and the bisulfuranyl dimer with a S(IV)-S(IV) bond