Gyula Pal Szokoly

XMM-Newton serendipitous survey. IV (Barcons+, 2007)

Xavier Barcons, Richard G. McMahon, Francisco J. Carrera, 2007 .

Understanding the sources of the X-ray background: VLT identifications in the Chandra/XMM-Newton deep field south

Jacqueline Bergeron, Piero Rosati, Günther Hasinger, 2002 .

The Third Data Release of the Sloan Digital Sky Survey

Aniruddha R. Thakar, Alexander S. Szalay, Mamoru Doi, 2004 .