Large scale structures around radio galaxies at z ~ 1.5 A. Galametz, C. De Breuck, J. Vernet, D. Stern, A. Rettura, C. Marmo, A. Omont, M. Allen and N. Seymour A&A, 507 1 (2009) 131-145 Published online: 03 September 2009 DOI: 10.1051/0004-6361/200912177