@misc{indiciaef26f0b97c9c5,
  title = {Radiation amplification through autoionizing resonances without population inversion.},
  author = {A Lyras and X Tang and P Lambropoulos and J Zhang},
  year = {1989},
  doi = {10.1103/physreva.40.4131},
  url = {https://pubmed.ncbi.nlm.nih.gov/9902645/},
  note = {Source identifier: 9902645}
}