XMM-Newton reveals a Seyfert-like X-ray spectrum in the z = 3.6 QSO B1422+231 M. Dadina, C. Vignali, M. Cappi, G. Lanzuisi, G. Ponti, B. De Marco, G. Chartas and M. Giustini A&A, 592 (2016) A104 Published online: 08 August 2016 DOI: 10.1051/0004-6361/201628467