1. M. C. R. Symons, Chem. Soc. Rev,13, No. 4, 393 (1984).
2. Z. V. Todres, Ion-Radicals in Organic Synthesis [in Russian], Vol. 2, Khimiya, Moscow (1986), p. 26.
3. O. Hammerich and V. D. Parker, Adv. Phys. Org. Chem.,20, 55 (1984).
4. K. Yoshida, Electrooxidation in Organic Chemistry. The Role of Cation Radicals as Synthetic Intermediates, Wiley-Interscience, New York (1983).
5. M. M. Baizer and Kh. M. Lunda (eds.), Organic Electrochemistry [in Russian], Vol. 2, Khimiya, Moscow (1988), p. 672.