The largest X-ray-selected sample of z>3 AGNs: C-COSMOS and ChaMPDOI: info:10.1093/mnras/stu1745v. 4451430–1448
Kalfountzou, E., Civano, Francesca, Elvis, M., Trichas, M., and Green, P. 2014. "The largest X-ray-selected sample of z>3 AGNs: C-COSMOS and ChaMP." Monthly Notices of the Royal Astronomical Society, 445 1430–1448. https://doi.org/10.1093/mnras/stu1745.