@misc{indiciae3e102e7edabf,
  title = {Nine optically selected quasars with redshifts larger than 3},
  author = {Schmidt, Maarten and Schneider, Donald P. and Gunn, James E.},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19870052043},
  note = {Source identifier: 19870052043}
}