M. J. Page

The XMM-Newton bright serendipitous survey - Identification and optical spectral properties

X. Barcons, F. J. Carrera, R. Della Ceca, 2007, 0710.0955.

XMM-Newton observation of the lockman hole. I. The X-ray data

X. Barcons, R. S. Warwick, M. G. Watson, 2000, astro-ph/0011271.