@misc{indiciae3b5a7beacaf4,
  title = {Phase-sensitive amplification in a three-level atomic system.},
  author = {NA Ansari and J Gea-Banacloche and MS Zubairy},
  year = {1990},
  doi = {10.1103/physreva.41.5179},
  url = {https://pubmed.ncbi.nlm.nih.gov/9903745/},
  note = {Source identifier: 9903745}
}