@article{Abe_1992,
title={Excitons and nonlinear optical spectra in conjugated polymers},
volume={45},
ISSN={1095-3795},
url={http://dx.doi.org/10.1103/physrevb.45.9432},
DOI={10.1103/physrevb.45.9432},
number={16},
journal={Physical Review B},
publisher={American Physical Society (APS)},
author={Abe,
S. and Schreiber,
M. and Su,
W. P. and Yu,
J.},
year={1992},
month=apr,
pages={9432–9435} }