1. (a) T. Ito, H. Shirakawa, and S. Ikeda, J. Polym. Sci., Polym. Chem. Ed., 12, 11 (1974);
2. (b) J.C.W. Chien, ??????Polyacetylene ??? Chemistry, Physics and Material Science??????, Academic Press, Orlando, FL (1984), Chap. 2.
3. (a) H. Naarrmann and N. Theophilou, Synth. Met., 22, 1 (1987);
4. (b) K. Akagi, M. Suezaki, H. Shirakawa, H. Kyotani, M. Shimomura, and Y. Tanabe, Synth. Met., 28, D1 (1989);
5. (c) J. Tsukamoto, A. Takahashi, and K. Kawasaki, Jpn. J. Appl. Phys., 29, 125 (1990).