Measurement of the Energy Spectrum of Cosmic Rays above 10¹⁸ eV Using the Pierre Auger Observatory
Pierre Auger · 2010 · Phys.Lett.B 685 239

Cosmic-ray energy spectrum · 2010 · PhD thesis 2008
The first precise measurement of the energy spectrum of ultra-high-energy cosmic rays from hybrid events, seen at the same time by the fluorescence and surface detectors of the Pierre Auger Observatory.
Our part
The main result of Fabian's PhD thesis at the Universität Karlsruhe, published by the Pierre Auger Collaboration in Physics Letters B.

Pierre Auger · 2010 · Phys.Lett.B 685 239