Luo, B., Brandt, W., Xue, Y., Alexander, D., Brusa, M., Bauer, F., …Vignali, C. (2011). Revealing a Population of Heavily Obscured Active Galactic Nuclei at z ≈ 0.5-1 in the Chandra Deep Field-South. Astrophysical Journal, 740(1), Article 37. https://doi.org/10.1088/0004-637x/740/1/37