@misc{indiciaeb02946017545,
  title = {Macroscopic dark periods without a metastable state.},
  author = {GC Hegerfeldt and MB Plenio},
  year = {1992},
  doi = {10.1103/physreva.46.373},
  url = {https://pubmed.ncbi.nlm.nih.gov/9907873/},
  note = {Source identifier: 9907873}
}