Fast supermassive black hole growth in the SPT2349–56 protocluster at z = 4.3 F. Vito, W. N. Brandt, A. Comastri, R. Gilli, R. J. Ivison, G. Lanzuisi, B. D. Lehmer, I. E. Lopez, P. Tozzi and C. Vignali A&A, 689 (2024) A130 Published online: 06 September 2024 DOI: 10.1051/0004-6361/202450225