1. A. Letessier-Selvon, T. Stanev, Ultrahigh energy cosmic rays, ArXiv e-prints. .
2. Observation of the GZK cutoff using the HiRes detector;Bergman;Nucl. Phys. B. Proc. Suppl.,2007
3. T. Yamamoto, for the Pierre Auger Collaboration, The UHECR spectrum measured at the Pierre Auger Observatory and its astrophysical implications, ArXiv e-prints. .
4. Spectrum of cosmic rays produced in supernova remnants;Berezhko;Astrophys. J.,2007
5. A regular mechanism for the acceleration of charged particles on the front of a shock wave;Krymskii;Sov. Phys. Dokl.,1977