@article{5372,
  author = {Sydney Geltman},
  title = {Excitation and ionization of hydrogen atoms by ultra-intense fields},
  year = {1994},
  journal = {Journal of Physics B: Atomic, Molecular and Optical Physics},
  volume = {27},
  pages = {257-270},
  month = {Apr-01-1996},
  issn = {0953-4075},
  doi = {10.1088/0953-4075/27/2/004},
}