1. F. Winslow, W. Baker, and W. Jager, J. Am. Chem. Soc., 77:4751 (1955).
2. B. I. Liogon’kii, A. S. Lyubcheno, A. A. Berlin, L. A. Blyumenfel’d, and V. P. Parini, Vysokomolek. Soedin., 2:1494 (1960).
3. D. Ingram, Free Radicals as Studied by Electron Spin Resonance, Butterworth, London (1958).
4. A. A. Berlin, Khim. Prom., 1962(12):23.
5. E. L. Frankevich and V. L. Tal’roze, Proceedings of the Second All-Union Conference on Radiation Chemistry ]in Russian], Izd. Akad. Nauk SSSR, Moscow (1962), p. 651.