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3. Z. V. Todres, Radical Ions in Organic Synthesis (Khimiya, Moscow, 1986) [in Russian].
4. K. Uoshida, Electrooxidation in Organic Chemistry (Wiley: New York, 1984; Mir, Moscow, 1987).
5. V. F. Traven’, Electronic Structure and Properties of Organic Molecules (Khimiya, Moscow, 1989) [in Russian].