@article{9594,
  author = {M. Hidalgo and Sydney Geltman},
  title = {A high energy approximation. III. Helium excitation by electrons},
  year = {1972},
  journal = {Journal of Physics B: Atomic and Molecular Physics},
  volume = {5},
  pages = {617-626},
  month = {Jan-03-1972},
  issn = {0022-3700},
  doi = {10.1088/0022-3700/5/3/029},
}