@misc{indiciaeb04a1114aced,
  title = {Bulk excitonic effects in surface optical spectra.},
  author = {P H Hahn and W G Schmidt and F Bechstedt},
  year = {2001},
  doi = {10.1103/physrevlett.88.016402},
  url = {https://pubmed.ncbi.nlm.nih.gov/11800974/},
  note = {Source identifier: 11800974}
}