@misc{indiciaeed09e7c2fe18,
  title = {Photon entanglement in macroscopic systems.},
  author = {JD Franson},
  year = {1992},
  doi = {10.1103/physreva.45.8074},
  url = {https://pubmed.ncbi.nlm.nih.gov/9906902/},
  note = {Source identifier: 9906902}
}