1. M. Mendolia, H. Cai, G. Farrington, in Applications of Electroactive Polymers (B. Scrosati, Ed.), Chapman & Hall. New York (1993), p. 114.
2. Encyclopaedia of Polymers (V.A. Kargin et al., Ed.). Sovetskaja Entsiklopedija, Moscow (1974),V 1, p. 310.
3. A.K. Gupta. Navin Chand, J. Polym. Sci.: Polym. Phys. Ed.18, 1125 (1980).
4. Ion Solvation (G.A. Krestov, Ed.). Nauka, Moscow (1987) p. 100.
5. V.N. Filimonov, D.S. Bystrov, Russ. J. Optika i Spektroskopija12, 66 (1962).