The z>3 sample in the Chandra COSMOS Legacy survey Marchesi, S. ; Civano, F. ; Shankar, F. ; Urey, M. ; Elvis, M. ; Comastri, A. ; Vignali, C. Abstract Publication: Demographics and Environment of AGN from Multi-Wavelength Surveys Pub Date: September 2015 Bibcode: 2015deam.confE..67M