@misc{indiciaedf9b95aaad3c,
  title = {Mode entanglement in nondegenerate down-conversion with quantized pump.},
  author = {G Drobn and I Jex and V Buzek},
  year = {1993},
  doi = {10.1103/physreva.48.569},
  url = {https://pubmed.ncbi.nlm.nih.gov/9909630/},
  note = {Source identifier: 9909630}
}