XMM-Newton observations of the Lockman Hole IV: spectra of the brightest AGNS. Mateos, X. Barcons, F. J. Carrera, M. T. Ceballos, G. Hasinger, I. Lehmann, A. C. Fabian and A. StreblyanskaA&A, 444 1 (2005) 79-99DOI: https://doi.org/10.1051/0004-6361:20052881