@misc{indiciae561c4da536be,
  title = {Hydrogenic image-potential states: A critical examination.},
  author = {K Giesen and F Hage and FJ Himpsel and HJ Riess and W Steinmann},
  year = {1986},
  doi = {10.1103/physrevb.33.5241},
  url = {https://pubmed.ncbi.nlm.nih.gov/9939021/},
  note = {Source identifier: 9939021}
}