The XXL Survey - XII. Optical spectroscopy of X-ray-selected clusters and the frequency of AGN in superclusters
E. Koulouridis, B. Poggianti, B. Altieri, I. Valtchanov, Y. Jaffé, C. Adami, A. Elyiv, O. Melnyk, S. Fotopoulou, F. Gastaldello, C. Horellou, M. Pierre, F. Pacaud, M. Plionis, T. Sadibekova and J. Surdej
A&A, 592 (2016) A11
DOI: https://doi.org/10.1051/0004-6361/201526976
