References
- U.S. Patent 2,363,516
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- J. Amer. Chem. Soc. v.73 J. D. Park;W. R. Lycan;J. R. Lacher
- J. Chem. Soc. R.N. Haszeldine;B. R. Steele
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- J. Chem. Soc. R.N. Haszeldine