1. S. Kivelson and A.J. Heeger, Synth. Met. 22, 37, (1988).
2. A.J. Heeger, S. Kivelson, J.R. Schrieffer and W.P. Su, Rev.Mod.Phys. 60, 782 (1988).
3. Handbook of Conducting Polymers, Vol. I and II, Ed. by T. Skotheim, ( Marcel Dekker, New York, 1986 ).
4. J.L. Bredas and G.B. Street, Accounts Chem. Research, 18, 309 (1985).
5. Y. Termonia and P. Smith, in “The Path to High Modulus Polymers with Stiff and Flexible Chains”, edited by A.E. Zachariades and R.S. Porter ( Marcel Dekker, New York, 1988 ) p. 321.