1. 1) A. Rembaum, W. Baumgartner, and A. Eisenberg, J. Polym. Sci., Part B: Polym. Lett., 6, 159 (1968).
2. 2) A. Rembaum and H. Noguchi, Macromolecules, 5, 261 (1972).
3. 3) S. R. Williams and T. E. Long, Prog. Polym. Sci., 34, 762 (2009).
4. 4) A. Eisenberg and M. King, “Ion-containing Polymers, Physical Properties and Structure”, Academic Press, Chapter IV, New York (1977), pp. 139–227.
5. 5) S. Kohjiya, T. Ohtsuki, and S. Yamashita, Makromol. Chem. Rapid Commun., 2, 417 (1981).