@misc{indiciae1baac84449d2,
  title = {Nonequilibrium Green-function theory of quantum-optical correlations.},
  author = {CJ Mertens and TA Kennedy},
  year = {1996},
  doi = {10.1103/physreva.53.3497},
  url = {https://pubmed.ncbi.nlm.nih.gov/9913293/},
  note = {Source identifier: 9913293}
}