1. Harrison, M.G. and Friend, R.H., Electronic Materials: The Oligomer Approach, New York: Wiley-VCH, 1998, p. 515.
2. Handbook of Oligo- and Polythiophenes, Fichou, D., Ed., Weinheim: Wiley-VCH, 1999, 534 p.
3. Handbook of Organic Conducting Molecules and Polymers, Nalwa, H.S., Ed., New York: Wiley, 1997.
4. Gurunathan, K., Murugan, A.V., Marimuthu, R., Mulik, U.P., and Amalnerkar, D.P., Mater. Chem. Phys., 1999, vol. 61, no. 3, p. 173.
5. Greiner, A., Polym. Adv. Tecnol., 1998, vol. 9, no. 7, p. 371.