1. R M Dell and D A J Rand,Clean Energy, Series Editor, J H Clark, The Royal Society of Chemistry, 2004.
2. Hand Book of Conducting Polymers, Vols. I & II, Ed. T A Skotheim, Marcel Dekker, New York, 1986.
3. The Hindu Speaks on Scientific Facts, Vol. II, Editor-in-chief, N Ram, Kasturi & Sons Ltd., p.207, 2004.
4. J Halme,Master’s Thesis, Helsinki Institute of Technology, Helsinki, 2002.