XMM-Newton observation of the Lockman Hole - II. Spectral analysisV. Mainieri, J. Bergeron, G. Hasinger, I. Lehmann, P. Rosati, M. Schmidt, G. Szokoly and R. Della CecaA&A, 393 2 (2002) 425-438DOI: https://doi.org/10.1051/0004-6361:20020991
