@misc{indiciae4108e703a6da,
  title = {On the relationship between optically selected and X-ray-selected active galactic nuclei},
  author = {Franceschini, A. and Gioia, I. M. and Maccacaro, T.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860044780},
  note = {Source identifier: 19860044780}
}