@misc{indiciae1238b19a0e36,
  title = {Multiple quasars for multiple images},
  author = {Bahcall, John N. and Bahcall, Neta A. and Schneider, Donald P.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19870033893},
  note = {Source identifier: 19870033893}
}