Rovilos, E., Fotopoulou, S., Salvato, M., Burwitz, V., Egami, E., Hasinger, G., et al. (2011). Optical and infrared properties of active galactic nuclei in the Lockman Hole. Astronomy & Astrophysics, 529: A135 (20pp). doi:10.1051/0004-6361/201015763.