Excitonic effect in the optical spectrum of semiconductors.

@article{delCastilloMussot1985ExcitonicEI,
  title={Excitonic effect in the optical spectrum of semiconductors.},
  author={M delCastilloMussot and Sham},
  journal={Physical review. B, Condensed matter},
  year={1985},
  volume={31 4},
  pages={2092-2098}
}