@misc{indiciae9bb07cce3cd7,
  title = {Classical approximation for ionization by proton impact.},
  author = {Garcia, J. D. and Gerjuoy, E. and Welker, J. E.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680037227},
  note = {Source identifier: 19680037227}
}