@misc{indiciaebbe13b367cfd,
  title = {Generalized spheroidal wave equations from an image-potential method for surface effects on impurity states.},
  author = {Y Shan and TF Jiang and YC Lee},
  year = {1985},
  doi = {10.1103/physrevb.31.5487},
  url = {https://pubmed.ncbi.nlm.nih.gov/9936523/},
  note = {Source identifier: 9936523}
}