• Stanaback, R.J.: Tech. Pap. Soc. Plast. Engin., 23, 262 (1977)
• Nestmann, E.R. et al.: Water Chlorin. Env. Impact Health. Eff., 4, 1151 (1977)
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Source of bromochlorocarbene in the presence of base and Dibenzo-18-crown-6, A13133. Other conditions give mixtures of carbenes: Synthesis, 783 (1977); Tetrahedron, 33, 363 (1977).