Simultaneous detection and analysis of optical and ultraviolet broad emission lines in quasars at z ~ 2.2S. Bisogni, S. di Serego Alighieri, P. Goldoni, L. C. Ho, A. Marconi, G. Ponti and G. RisalitiA&A, 603 (2017) A1DOI: https://doi.org/10.1051/0004-6361/201630143
