@misc{indiciae7ec57f956bad,
  title = {Lamb-shift calculations for non-Coulomb potentials.},
  author = {KT Cheng and WR Johnson and J Sapirstein},
  year = {1993},
  doi = {10.1103/physreva.47.1817},
  url = {https://pubmed.ncbi.nlm.nih.gov/9909134/},
  note = {Source identifier: 9909134}
}