XMM-Newton observations reveal AGN in apparently normal galaxies
P. Severgnini, A. Caccianiga, V. Braito, R. Della Ceca, T. Maccacaro, A. Wolter, K. Sekiguchi, T. Sasaki, M. Yoshida, M. Akiyama, M. G. Watson, X. Barcons, F. J. Carrera, W. Pietsch and N. A. Webb
A&A, 406 2 (2003) 483-492
DOI: https://doi.org/10.1051/0004-6361:20030625
