1. S. N. Ushakov, Polyvinyl Alcohol and Its Derivatives (Akad. Nauk SSSR, Moscow, 1960) [in Russian].
2. F. Helfferich, Ion Exchange (McGraw Hill, New York, 1962; Inostr. Liter., Moscow, 1962).
3. N. P. Berezina and L. V. Karpenko, Kolloidn. Zh. 62(6), 1 (2000) [Colloid. J. 62, 676 (2000)].
4. K. A. Mauritz and A. J. Hopfinger, Modern Aspects Electrochem. 14, 425 (1982).
5. L. K. Arkhangel’skii, A. A. Voevodina, and E. A. Materova, Vestn. Leningr. Univ., Ser. Fiz., No. 22, 102 (1961).