G. K. Helmkamp and D. J. Pettitt (1966). "Trimethyloxonium 2,4,6-Trinitrobenzenesulfonate". Org. Synth. Cilt 46. s. 122. doi:10.15227/orgsyn.046.0122.
Ross, S.; Bassin, M.; Finkelstein, M.; Leac, A. L. (1954). "Molecular Compounds. I. Picryl Chloride-Hexamethylbenzene in Chloroform Solution". J. Am. Chem. Soc. Cilt 76. ss. 69-74. doi:10.1021/ja01630a018.
