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Merloni, A. ,  Treister, Ezequiel. ,  Bongiorno, A. ,  Brusa, Marcella ,  Iwasawa, K. ,  Mainieri, V. ,  Magnelli, B. ,  Salvato, M. ,  Berta, S. ,  Cappelluti N ,  Comastri, A. ,  [The incidence of obscuration in active galactic nuclei.] ,  The incidence of obscuration in active galactic nuclei.

Brusa, Marcella ,  Treister, Ezequiel. ,  Civano, Francesca ,  Comastri, A. ,  Miyaji, T. ,  Salvato, M. ,  Zamorani, G. ,  Cappelluti, N ,  Fiore, F. ,  Hasinger, G. ,  Mainieri, V. ,  [The XMM-Newton Wide-field Survey in the Cosmos Field (XMM-COSMOS): Demography and Multiwavelength Properties of Obscured and Unobscured Luminous Active Galactic Nuclei] ,  The XMM-Newton Wide-field Survey in the Cosmos Field (XMM-COSMOS): Demography and Multiwavelength Properties of Obscured and Unobscured Luminous Active Galactic Nuclei

Silverman, J. D. ,  Treister, Ezequiel. ,  Mainieri, V. ,  Salvato, M. ,  Hasinger, G. ,  Bergeron, J. ,  Capak, P. ,  Szokoly, G. ,  Finoguenov, A. ,  Gilli, R. ,  Rosati, P. ,  [The Extended Chandra Deep Field-South Survey: Optical Spectroscopy of Faint X-ray Sources with the VLT and Keck] ,  The Extended Chandra Deep Field-South Survey: Optical Spectroscopy of Faint X-ray Sources with the VLT and Keck