@misc{indiciae10e1bed37e81,
  title = {Active galactic nuclei.},
  author = {A C Fabian},
  year = {1999},
  doi = {10.1073/pnas.96.9.4749},
  url = {https://pubmed.ncbi.nlm.nih.gov/10220363/},
  note = {Source identifier: 10220363}
}