@article{9482,
  author = {Sydney Geltman and M. Hidalgo},
  title = {A high energy approximation. II. Hydrogen atom excitation by electrons},
  year = {1971},
  journal = {Journal of Physics B: Atomic and Molecular Physics},
  volume = {4},
  pages = {1299-1307},
  month = {Jan-10-1971},
  issn = {0022-3700},
  doi = {10.1088/0022-3700/4/10/015},
}