Tanaka, M., Finoguenov, A., Lilly, S. J., Bolzonella, M., Carollo, C. M., Contini, T., et al. (2012). X-ray groups of galaxies at 0.5 < z < 1 in zCOSMOS: increased AGN activities in high redshift groups. Publications of the Astronomical Society of Japan, 64(2), 22-1-22-11.