1. Sh. Nadzhimutdinov, A. A. Sarymsakov, and Kh. U. Usmanov, Cellul. Chem. Technol.,9, No. 6, 617 (1975).
2. Sh. Nadzhimutdinov, A. A. Sarymsakov, and Kh. U. Usmanov, Cellul. Chem. Technol.,15, No. 6, 613 (1981).
3. I. N. Ermolenko, Spectroscopy in the Chemistry of Oxidized Celluloses [in Russian], Minsk (1959), p. 164.
4. H. Becker, in: Modern Problems of Physical Organic Chemistry [Russian translation], IL, Moscow (1967), p. 250.
5. G. Rakhmanberdiev, Sh. Mirnigmatova, T. G. Gafurov, and Kh. U. Usmanov, Dokl. Akad. Nauk Uz., No. 6, 36 (1970).