@misc{indiciae5af6440a4022,
  title = {Resonators in quantum optics: A first-principles approach.},
  author = {L Knöll and W Vogel and D Welsch},
  year = {1991},
  doi = {10.1103/physreva.43.543},
  url = {https://pubmed.ncbi.nlm.nih.gov/9904808/},
  note = {Source identifier: 9904808}
}