Authors:
Fischer, JU
Hasinger, G
Schwope, AD
Brunner, H
Boller, T
Trumper, J
Voges, W
Neizvestny, S
Citation: Ju. Fischer et al., The ROSAT bright survey: I. Identification of an AGN sample with hard ROSAT X-ray spectra, ASTRON NACH, 319(6), 1998, pp. 347-368