@misc{indiciaebd6ce89d193c,
  title = {Two-level approach to saturation properties in semiconductor materials.},
  author = {de Rougemont F and R Frey},
  year = {1988},
  doi = {10.1103/physrevb.37.1237},
  url = {https://pubmed.ncbi.nlm.nih.gov/9944632/},
  note = {Source identifier: 9944632}
}