@ARTICLE{Severgnini2005, author = {{Severgnini}, P. and {Della Ceca}, R. and {Braito}, V. and {Saracco}, P. and {Longhetti}, M. and {Bender}, R. and {Drory}, N. and {Feulner}, G. and {Hopp}, U. and {Mannucci}, F. and {Maraston}, C.}, title = "{Looking for obscured QSOs in the X-ray emitting ERO population}", journal = {Astronomy \& Astrophysics}, keywords = {galaxies: active, X-rays: galaxies}, year = 2005, month = feb, volume = 431, pages = {87-95}, doi = {10.1051/0004-6361:20041587}, }