Soft-x-ray amplification of the Lyman- alpha transition by optical-field-induced ionization.

@article{Nagata1993SoftxrayAO,
  title={Soft-x-ray amplification of the Lyman- alpha transition by optical-field-induced ionization.},
  author={Nagata and Midorikawa and Kubodera and Obara and Tashiro and Toyoda},
  journal={Physical review letters},
  year={1993},
  volume={71 23},
  pages={3774-3777}
}