Spectroscopic characterization of the protocluster of galaxies around 7C 1756+6520 at z ~ 1.4 V. Casasola, L. Magrini, F. Combes, E. Sani, J. Fritz, G. Rodighiero, B. Poggianti, S. Bianchi and E. Liuzzo A&A, 618 (2018) A128 Published online: 19 October 2018 DOI: 10.1051/0004-6361/201833052