XQR-30: Black hole masses and accretion rates of 42 z ≳ 6 quasars C. Mazzucchelli, M. Bischetti, V. D’Odorico, C. Feruglio, J.-T. Schindler, M. Onoue, E. Bañados, G. D. Becker, F. Bian, S. Carniani et al. (12 more) A&A, 676 (2023) A71 Published online: 08 August 2023 DOI: 10.1051/0004-6361/202346317