@misc{indiciaef6922b5fabe2,
  title = {The Hard X-ray 20-40 keV AGN Luminosity Function},
  author = {Beckmann, V. and Soldi, S. and Shrader, C. R. and Gehrels, N. and Produit, N.},
  year = {2006},
  url = {https://ntrs.nasa.gov/citations/20060013221},
  note = {Source identifier: 20060013221}
}