Polletta, M., Omont, A., Berta, S., Bergeron, J., Stalin, C. S., Petitjean, P., et al. (2008). Obscured and powerful AGN and starburst activities at z ~ 3.5. Astronomy & Astrophysics, 492(1), 81-92. doi:10.1051/0004-6361:200810345.