Identification of a complete sample of northern ROSAT All-sky survey   X-ray sources. VII. The AGN subsample
  In order to derive statistical properties of a complete X-ray selected sample of AGN we used the classification spectra of the RASS Selected Areas-North survey to study the luminosities, redshifts, X-ray/visual flux ratios, line widths, and various correlations between observed parameters of all Seyfert galaxies and QSOs in this sample. On the basis of these data we discuss implications for the current AGN models. 
I. Appenzeller, F.-J. Zickgraf, J. Krautter, W. Voges