1. R. Z. Pen and V. R. Pen, in Kinetics of Delignification (Krasnoyarsk, 1998), pp. 33–65 [in Russian].
2. S. A. Kuznetsova, Extended Abstract of Doctoral Dissertation in Chemistry (Krasnoyarsk, 2005).
3. K. G. Bogolitsyn and V. M. Reznikov, Chemistry of Sulfite Methods for Wood Delignification (Ekologiya, Moscow, 1994) [in Russian].
4. E. G. Lyubeshkina, Usp. Khim. 52(7), 1196 (1983).
5. P. S. Bailey, in Ozonation in Organic Chemistry (Academic, New York, 1982), Vol. 2, p. 36.