1. J.L. Bredas, J. Cornil, F. Heyers, D. Beljonne, in Handbook of Conducting Polymers, ed. by T.A. Skotheim, R.L. Elsenbaumer, J.R. Reynolds, 2nd edn. (CRC Taylor & Francis, New York, 1997), pp. 1–27
2. M.R. Anderson, B.R. Mattes, H. Reiss, R.B. Kaner, Science 252, 1412–1415 (1991)
3. J.C. Chiang, A.G. MacDiarmid, Synth. Met 13, 193–205 (1986)
4. R. Kumar, S. Singh, B.C. Yadav, Int. Adv. Res. J. Sci. Eng.Technol. 2, 110–124 (2015)
5. K.R. Reddy, B.C. Sin, K.S. Ryu, J.C. Kim, H. Chung, Y. Lee, Synth. Met. 159, 595–603 (2009)