@misc{indiciaeb62547cf15b4,
  title = {Photon-number fluctuations in phase-sensitive linear amplifiers.},
  author = {SM Barnett and CR Gilson},
  year = {1989},
  doi = {10.1103/physreva.40.6314},
  url = {https://pubmed.ncbi.nlm.nih.gov/9902024/},
  note = {Source identifier: 9902024}
}