G. Covone (1,2,3),
M. Paolillo (1,3),
N.R. Napolitano (2),
M. Capaccioli (1,4),
G. Longo (1),
J.P. Kneib (5),
E. Jullo (5,6),
J. Richard (7),
O. Khovanskaya (8),
M. Sazhin (8),
N.A. Grogin (9),
E. Schreier (10) ((1) University of Naples "Federico II", (2) INAF, Naples, (3) INFN, Naples, (4) INAF--VSTCeN, Naples (5) OAMP, Marseille, (6) ESO, Santiago, (7) Caltech, Pasadena, (8) Sternberg Astronomical Institute, Moscow (9) Arizona State University, USA, (10) Associated Universities Inc., USA)