@misc{indiciae455dbc743a94,
  title = {Photoionization cross section of hydrogenic atoms: A generating function solution.},
  author = {N Shafer and R Bersohn},
  year = {1990},
  doi = {10.1103/physreva.42.1313},
  url = {https://pubmed.ncbi.nlm.nih.gov/9904157/},
  note = {Source identifier: 9904157}
}