Citation: J. Bakhshi Ak",deepika,"ladik, AB-INITIO STUDY OF THE ELECTRONIC-STRUCTURES OF POLYCYCLOPENTADITHIOPHENE-4-ONE AND POLYDICYANOMETHYLENE-CYCLOPENTADITHIOPHENE - 2 CONJUGATED POLYMERS WITH SMALL BAND-GAPS, Solid state communications, 101(5), 1997, pp. 347-350