Grogin, N. A., Koekemoer, A. M., Schreier, E. J., Bergeron, J., Giacconi, R., Hasinger, G., Kewley, L., Norman, C., Rosati,
P., Tozzi, P., & Zirm, A. (2003). Hubble Space Telescope imaging in the Chandra
deep field-south. III. Quantitative morphology of the 1 million second Chandra counterparts and comparison with the field
population. The Astrophysical Journal, 595, 685-697.