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Belloni, T.; Snowden, S. L.: A deep ROSAT observation of the highly variable AGN 1E1403+5439 - or ROSAT non-detection of the weak AGN 1E1403+5439. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 187 - 190 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Boller, T.; Meurs, E. J. A.; Brinkmann, W.; Fink, H.; Zimmermann, H. U.; Adorf, H.-M.: ROSAT all sky survey observations of IRAS galaxies. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 231 - 234 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Brunner, H.; Friedrich, P.; Zimmermann, H. U.; Staubert, R.: Spectra of radio-loud quasars observed in the ROSAT/XRT all sky survey. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 198 - 201 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

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Fink, H. H.; Thomas, H.-C.; Brinkmann, W.; Okayasu, R.; Hartner, G.: X-ray spectra of bright BL Lacertae objects observed with ROSAT. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 202 - 205 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Hasinger, G.: ROSAT deep surveys. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 321 - 331 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Mas Hesse, J. M.; Mirabel, I. F.; Zimmermann, H. U.: Soft X-ray segregation of Seyfert galaxies. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 238 - 241 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Meurs, E. J. A.; Boller, T.; Brinkmann, W.; Fink, H. H.; Zimmermann, H. U.; Miley, G. K.; Ward, M. J.: The X-ray properties of warm IRAS galaxies. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 235 - 237 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Montigny, C. v.: First results from the Compton observatory. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 58 - 61 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Neumann, M.; Reich, W.; Fürst, E.; Brinkmann, W.; Reich, P.; Wielebinski, R.; Fink, H. H.; Trümper, J.: Multifrequency observations of ROSAT selected radio sources. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 163 - 168 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Pierre, M.: Contribution of clusters of galaxies to the XRB. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 341 - 344 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Schaeidt, S. G.; Hasinger, G.; Trümper, J.: Time variability of extragalactic sources in the ecliptic pole regions. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 191 - 194 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Schartel, N.; Fink, H.; Brinkmann, W.; Trümper, J.: A comparative study of soft X-ray QSO spectra. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 195 - 197 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Thomas, H.-C.; Beuermann, K.; Brinkmann, W.; Fink, H. H.; Voges, W.: Spectroscopic identification of X-ray soft AGN found by ROSAT. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 383 - 386 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

Treves, A.; Belloni, T.; Falomo, R.; Fink, H.; Maraschi, L.; Zimmermann, H. U.: Preliminary results on ROSAT observations of the blazar PKS 0537-441. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 206 - 209 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

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Ulrich, M.-H.; Fink, H. H.; Schaeidt, S.; Brinkmann, W.; Kolman, M.; Malkan, M. A.; Maraschi, L.; Treves, A.; Wagner, S.: The quasar 1821+643 during the ROSAT survey. In: X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background: Proceedings of a Conference held at the Max-Planck-Institut für extraterrestrische Physik, S. 169 - 174 (Hg. Brinkmann, W.; Trümper, J.). X-Ray Emission from Active Galactic Nuclei and the Cosmic X-Ray Background, Garching, Germany, 04. November 1991 - 08. November 1991. Max-Planck-Institut für extraterrestrische Physik, Garching, Germany (1992)

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Schachter, J. F.; Elvis, M.; Stocke, J.; Voges, W.: New heavily absorbed AGN and BL Lac objects identified from X-ray/radio/optical databases. In: Astronomy from Large Databases II - Proceedings, S. 491 - 496 (Hg. Heck, A.; Murtagh, F.). Astronomy from Large Databases II, Haguenau, France, 14. September 1992 - 16. September 1992. European Southern Observatory, Garching, Germany (1992)