Richards, GT, Fan, X, Schneider, DP, Vanden Berk, DE
, Strauss, MA, York, DG, Anderson, JE, Anderson, SF, Annis, J
, Bahcall, NA, Bernardi, M, Briggs, JW, Brinkmann, J, Brunner, R, Burles, S, Carey, L, Castander, FJ, Connolly, AJ, Crocker, JH, Csabai, I, Doi, M, Finkbeiner, D, Friedman, SD, Frieman, JA, Fukugita, M, Gunn, JE, Hindsley, RB, Ivezić, Ž, Kent, S, Knapp, GR, Lamb, DQ, Leger, RF, Long, DC, Loveday, J
, Lupton, RH, McKay, TA, Meiksin, A, Merrelli, A, Munn, JA, Newberg, HJ, Newcomb, M, Nichol, RC, Owen, R, Pier, JR, Pope, A, Richmond, MW, Rockosi, CM, Schlegel, DJ, Siegmund, WA, Smee, S, Snir, Y, Stoughton, C, Stubbs, C, SubbaRao, M, Szalay, AS, Szokoly, GP, Tremonti, C, Uomoto, A, Waddell, P, Yanny, B & Zheng, W 2001, '
Colors of 2625 quasars at 0 < z < 5 measured in the sloan digital sky survey photometric system',
Astronomical Journal, vol. 121, no. 5, pp. 2308-2330.
https://doi.org/10.1086/320392