The luminosity function of high-redshift quasi-stellar objects. A combined analysis of GOODS and SDSSF. Fontanot, S. Cristiani, P. Monaco, M. Nonino, E. Vanzella, W. N. Brandt, A. Grazian and J. MaoA&A, 461 1 (2007) 39-48DOI: https://doi.org/10.1051/0004-6361:20066073
