@article{9964,
  author = {Sydney Geltman},
  title = {The Coulomb-projected Born approximation. V. Ionization of helium},
  year = {1974},
  journal = {Journal of Physics B: Atomic and Molecular Physics},
  volume = {7},
  pages = {1994-2002},
  month = {Sep-10-1975},
  issn = {0022-3700},
  doi = {10.1088/0022-3700/7/15/008},
}