Mannheim, KarlElsasser, D.Kneiske, Tanja Manuela2009-12-072009-12-072008Relativistic Astrophysics Legacy and Cosmology - Einstein's Legacy / B. Aschenbach, V. Burwitz, G. Hasinger and B. Leibundgut (eds.):pp.247-2539783540747123http://hdl.handle.net/2440/54396Proceedings of the MPE/USM/MPA/ESO Joint Astronomy Conference Held in Munich, Germany, 7-11 November 2005enExtragalactic background above GeV: Peaked BL lacertae objects or DM?Book chapter0020083696