Mainieri, V., Rosati, P., Tozzi, P., Bergeron, J., Gilli, R., Hasinger, G., et al. (2005). The Chandra deep field south/GOODS survey - optically faint X-ray sources. Astronomy & Astrophysics, 437(3), 805-821. doi:10.1051/0004-6361:20041212.