@misc{indiciaedadb0889ac62,
  title = {Can quasars photoionize the intergalactic medium at high redshift?},
  author = {Meiksin, Avery and Madau, Piero},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930017567},
  note = {Source identifier: 19930017567}
}