I Zw 1 observed with XMM-Newton - Low-energy spectral complexity, iron lines, and hard X-ray flaresL. C. Gallo, Th. Boller, W. N. Brandt, A. C. Fabian and S. VaughanA&A, 417 1 (2004) 29-38DOI: https://doi.org/10.1051/0004-6361:20034411