Wai, Kwok-Fai; Sammes, Michael P. (1992). “Dithiazoles and related compounds. Part. 4. Preparation of 1,4,2-dithiazolium salts unsubstituted at C-5 including the parent heterocycle, NMR spectroscopic evidence for aromaticity, and some novel reactions”. Journal of the Chemical Society, Perkin Transactions 1 (16): 2065. doi:10.1039/p19920002065. ISSN0300-922X.
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Wai, Kwok-Fai; Sammes, Michael P. (1992). “Dithiazoles and related compounds. Part. 4. Preparation of 1,4,2-dithiazolium salts unsubstituted at C-5 including the parent heterocycle, NMR spectroscopic evidence for aromaticity, and some novel reactions”. Journal of the Chemical Society, Perkin Transactions 1 (16): 2065. doi:10.1039/p19920002065. ISSN0300-922X.