@misc{indiciae2192c8ac27fd,
  title = {Three-photon spectroscopy on thin films.},
  author = {D Fröhlich and J Kauschalek and W Nieswand and C Pahlke},
  year = {1992},
  doi = {10.1103/physrevb.45.11016},
  url = {https://pubmed.ncbi.nlm.nih.gov/10001022/},
  note = {Source identifier: 10001022}
}