1. Waters, W. A., "The Chemistry of Free Radicals", 183 (Oxford University Press, 1946); compare Kharasch, M. S., Engelman, H., and Mayo, F. R., J. Org. Chem., 2, 288 (1937).
2. Mayo, F. R., and Walling, C., Chem. Rev., 27, 351 (1940).
3. Price, C. C., "Mechanisms of Reactions at Carbon-Carbon Double Bonds", 63 (Interscience Publishers, Inc., 1946); see also Remick, A. E., "Electronic Interpretations of Organic Chemistry", 275 (J. Wiley and Sons, 1943).
4. Koelsch, C. F., and Boekelheide, V., J. Amer. Chem. Soc., 66, 412 (1944).