@misc{indiciae50a63d25c332,
  title = {Four-photon squeezed states: An exactly solvable model.},
  author = {P Tombesi and A Mecozzi},
  year = {1988},
  doi = {10.1103/physreva.37.4778},
  url = {https://pubmed.ncbi.nlm.nih.gov/9899626/},
  note = {Source identifier: 9899626}
}