PKS 0537-286, carrying the information of the environment of SMBHs in the early UniverseE. Bottacini, M. Ajello, J. Greiner, E. Pian, A. Rau, E. Palazzi, S. Covino, G. Ghisellini, T. Krühler, A. Küpcü Yoldaş, N. Cappelluti and P. AfonsoA&A, 509 (2010) A69DOI: https://doi.org/10.1051/0004-6361/200913260
