@misc{indiciae566c73af7d13,
  title = {Mode-locked two-photon states.},
  author = {Y J Lu and R L Campbell and Z Y Ou},
  year = {2003},
  doi = {10.1103/physrevlett.91.163602},
  url = {https://pubmed.ncbi.nlm.nih.gov/14611404/},
  note = {Source identifier: 14611404}
}