@misc{indiciae9cb48900edac,
  title = {Photon echoes with coherent and squeezed pulses.},
  author = {AS Parkins and CW Gardiner},
  year = {1989},
  doi = {10.1103/physreva.40.2534},
  url = {https://pubmed.ncbi.nlm.nih.gov/9902437/},
  note = {Source identifier: 9902437}
}