1. Chiang, C. K. et al. Phys. Rev. Lett. 39, 1098–1101 (1977).
2. Lee, K. et al. Nature 441, 65–68 (2006).
3. Kohlman, R. S. & Epstein, A. J. in Handbook of Conducting Polymers (eds Skotheim, T. A., Elsenbaumer, R. L. & Reynolds, J. R.) 85–121 (Dekker, New York, 1998).
4. Menon, R., Yoo, C. O., Moses, D. & Heeger, A. J. in Handbook of Conducting Polymers (eds Skotheim, T. A., Elsenbaumer, R. L. & Reynolds, J. R.) 27–84 (Dekker, New York, 1998).
5. Heeger, A. J. et al. Rev. Mod. Phys. 60, 781–850 (1988).