@misc{indiciae8a6ad6054a6b,
  title = {Enhanced squeezing with mixed two-photon and four-photon processes in two external pump fields.},
  author = {P Tombesi},
  year = {1989},
  doi = {10.1103/physreva.39.4288},
  url = {https://pubmed.ncbi.nlm.nih.gov/9901764/},
  note = {Source identifier: 9901764}
}